A stochastic model of conducting crack propagation is presented to provide a conceptual framework dedicated to the study of the formation of fractal structure of dielectric ageing patterns as a result of a competition...A stochastic model of conducting crack propagation is presented to provide a conceptual framework dedicated to the study of the formation of fractal structure of dielectric ageing patterns as a result of a competition between random fluctuation growth and applied electric strength enhanced deterministic growth. The necessary and sufficient conditions resulting in fractal behaviour in dielectric ageing are found.展开更多
Background Frailty is a new prognostic factor in cardiovascular medicine due to the aging and increasingly complex nature of elderly patients. It is useful and meaningful to prospectively analyze the manner in which f...Background Frailty is a new prognostic factor in cardiovascular medicine due to the aging and increasingly complex nature of elderly patients. It is useful and meaningful to prospectively analyze the manner in which frailty predicts short-term outcomes for elderly patients with acute coronary syndrome (ACS). Methods Patients aged 〉 65 years, with diagnosis of ACS from cardiology department and geriatrics department were included from single-center. Clinical data including geriatrics syndromes were collected using Comprehensive Geriatrics Assessment. Frailty was defined according to the Clinical Frailty Scale and the impact of the co-morbidities on risk was quantified by the coronary artery disease (CAD)--specific index. Patients were followed up by clinical visit or telephone consultation and the median follow-up time is 120 days. Following-up items included all-cause mortality, unscheduled return visit, in-hospital and recurrent major adverse cardiovascular events. Multivariable regression survival analysis was performed using Cox regression. Results Of the 352 patients, 152 (43.18%) were considered frail according to the study instrument (5-7 on the scale), and 93 (26.42%) were considered moderately or se- verely frail (6-7 on the scale). Geriatrics syndromes including incontinence, fall history, visual impairment, hearing impairment, constipation, chronic pain, sleeping disorder, dental problems, anxiety or depression, and delirium were more frequently in frail patients than in non-frail patients (P = 0.000, 0.031, 0.009, 0.014, 0.000, 0.003, 0.022, 0.000, 0.074, and 0.432, respectively). Adjusted for sex, age, severity of coro- nary artery diseases (left main coronary artery lesion or not) and co-morbidities (CAD specific index) by Cox survival analysis, frailty was found to be strongly and independently associated with risk for the primary composite outcomes: all-canse mortality [Hazard Ratio (HR) = 5.393; 95% CI: 1.477-19.692, P = 0.011] and unscheduled return visit (HR - 2.832; 95% CI: 1.140-7.037, P = 0.025). Conclusions Comprehensive Geriatrics Assessment and Clinical Frail Scale were useful in evaluation of elderly patients with ACS. Frailty was strongly and independently associated with short-term outcomes for elderly patients with ACS.展开更多
Cardiovascular disease, and in particular ischemic heart disease (IHD), is a major cause of morbidity and mortality in the very elderly (〉 80 years) worldwide. These patients represent a rapidly growing cohort pr...Cardiovascular disease, and in particular ischemic heart disease (IHD), is a major cause of morbidity and mortality in the very elderly (〉 80 years) worldwide. These patients represent a rapidly growing cohort presenting for percntaneous coronary intervention (PCI), now constituting more than one in five patients treated with PCI in real-world practice. Furthermore, they often have greater ischemic burden than their younger counterparts, suggesting that they have greater scope of benefit from coronary revascularization therapy. Despite this, the very elderly are frequently under-represented in clinical revascularization trials and historically there has been a degree of physician reluctance in referring them for PCI procedures, with perceptions of disappointing outcomes, low success and high complication rates. Several issues have contributed to this, including the tendency for older patients with IHD to present late, with atypical symptoms or non-diagnostic ECGs, and reservations regarding their procedural risk-to-benefit ratio, due to shorter life expectancy, presence of comorbidities and increased bleeding risk from antiplatelet and anticoagulation medications. However, advances in PCI technology and techniques over the past decade have led to better outcomes and lower risk of complications and the existing body of evidence now indicates that the very elderly actually derive more relative benefit from PCI than younger populations. Importantly, this applies to all PCI settings: elective, urgent and emergency. This review discusses the role of PCI in the very elderly presenting with chronic stable IHD, non ST-elevation acute coronary syndrome, and ST-elevation myocardial infarction. It also addresses the clinical challenges met when considering PCI in this cohort and the ongoing need for research and development to further improve outcomes in these challenging patients.展开更多
1 Introduction Ischemic heart disease is caused by atherosclerotic and/or thrombotic obstruction of coronary arteries. Clinical spec- trum of ischemic heart disease expands from asymptomatic atherosclerosis of corona...1 Introduction Ischemic heart disease is caused by atherosclerotic and/or thrombotic obstruction of coronary arteries. Clinical spec- trum of ischemic heart disease expands from asymptomatic atherosclerosis of coronary arteries to acute coronary syn- dromes (ACS) including unstable angina, acute myocardial infarction (non-ST elevation myocardial infarction and ST elevation myocardial infarction). Stable ischemic heart dis- ease (SIHD) refers to patients with known or suspected SIHD who have no recent or acute changes in their symp- tomatic status, suggesting no active thrombotic process is underway.展开更多
Coronary heart disease remains the leading cause of death in the developed world. Advanced age is the single strongest risk factor for coronary artery disease (CAD) and independent predictor for poor outcomes follow...Coronary heart disease remains the leading cause of death in the developed world. Advanced age is the single strongest risk factor for coronary artery disease (CAD) and independent predictor for poor outcomes following an acute coronary syndrome (ACS). ACS refers to a spectrum of conditions compatible with acute myocardial ischemia and/or infarction due to various degrees of reduction in co- ronary blood flow as a result of plaque rupture/erosion and thrombosis formation or supply and demand mismatch.展开更多
Chronic heart failure (CHF) is a complex clinical syndrome resulting from inefficient myocardial pumping, and is characterised by a typical progressively deteriorating trajectory punctuated by serious episodes of ac...Chronic heart failure (CHF) is a complex clinical syndrome resulting from inefficient myocardial pumping, and is characterised by a typical progressively deteriorating trajectory punctuated by serious episodes of acute disease decompensation.High prevalence of hospital admission has been reported.[2] However, around 40% of hospital admissions was avoidable if patients demonstrate consistent self-care.展开更多
Objective To investigate the relationship among serum vitamin D levels, physical performance impairment, and geriatric syndromes in elders with hypertension. Methods According to the concentration of vitamin D levels,...Objective To investigate the relationship among serum vitamin D levels, physical performance impairment, and geriatric syndromes in elders with hypertension. Methods According to the concentration of vitamin D levels, a total of 143 elderly patients with hypertension were classified into vitamin D deficient group (vitamin D 〈 20 ng/mL, n = 94) and vitamin D appropriate group (vitamin D 〉 20 ng/rnL, n = 49). Geriatric syndromes and physical performance were assessed by using comprehensive geriatric assessment (CGA). Correlation among vitamin D levels, geriatric syndromes and physical performance was analyzed. Results No statistical differences were found in various aspects of geriatric syndromes between the two groups (P 〉 0.05). While correlation analysis indicated that vitamin D levels had a positive association with ADL score (r = 0.235, P 〈 0.01) and a negative association with Morse fall scale score (r = 0.238, P 〈 0.01). Patients with deficient vitamin D level had longer time both in the Five Time Sit to Stand Test (5tSTS), (15.765 ± 5.593) and the four-meter walk test [7.440 (5.620, 9.200)], a weaker hand-grip in the grip strength test (28.049 ± 9.522), and a lower Tinetti performance-oriented mobility assessment (Tinetti POMA) [26 (22, 27)] and Balance subscale of the Tinetti performance-oriented mobility assessment (B-POMA) score [ 14 (12, 16)], compared with appropriate vitamin D level [(13.275 ± 3.692); 5.810 (4.728, 7.325)]; (31.989 ± 10.217); [26.5 (25, 28)]; [15 (14, 16), respectively, all P 〈 0.05]. Furthermore, results of logistic regression indicated that vitamin D was significantly associated with 5tSTS (OR = 1.2, 95% CI = 1.050-1.331, P 〈 0.01), Tinetti POMA (OR = 3.7, 95% CI:1.284-10.830, P 〈 0.05) and B-POMA (OR = 0.8, 95% CI:0.643-0.973, P 〈 0.05). Conclusions In elderly hypertensive patients, serum vitamin D deficient level is associated with physical performance impairment. However, no statistical significance was found between vitamin D and geriatric syndromes. Further study is required to investigate possible mechanisms for the association between vitamin D and physical performance.展开更多
The increasing population in older age will lead to greater numbers of them presenting with acute coronary syndromes (ACS). This has implications on global healthcare resources and necessitates better management and...The increasing population in older age will lead to greater numbers of them presenting with acute coronary syndromes (ACS). This has implications on global healthcare resources and necessitates better management and selection for evidenced-based therapies. The elderly are a high risk group with more significant treatment benefits than younger ACS. Nevertheless, age related inequalities in ACS care are recognised and persist. This discrepancy in care, to some extent, is explained by the higher frequency of atypical and delayed presentations in the elderly, and less diagnostic electrocardiograms at presentation, potentiating a delay in ACS diagnosis. Under estimation of mortality risk in the elderly due to limited consideration for physiological tiailty, co-morbidity, cognitive/psychological impairment and physical disability, less input by cardiology specialists and lack of randomised, controlled trials data to guide management in the elderly may further confound the inequality of care. While these inequalities exist, there remains a substantial opportunity to improve age related ACS outcomes. The selection of elderly patients for specific therapies and medication regimens are unanswered. There is a growing need for randomised, controlled trial data to be more representative of the population and enroll those of advanced age with co-morbidity. A lack of reporting of adverse events, such as renal impairment post coronary angiography, in the elderly further limit risk benefit decisions. Substantial improvements in care of elderly ACS patients are required and should be advocated. Ultimately, these improvements are likely to lead to better outcomes post ACS. However, the improvement in outcome is not infinite and will be limited by non-modifiable factors of age-related risk.展开更多
Background Smoking and other risk factors have been well known as important factors of variant angina or coronary artery spasm (CAS). However, clinical features related to age on coronary artery spasm have been rare...Background Smoking and other risk factors have been well known as important factors of variant angina or coronary artery spasm (CAS). However, clinical features related to age on coronary artery spasm have been rarely evaluated. Methods We evaluated 3155 consecutive patients with insignificant coronary artery lesion. Patients underwent Acetylcholine (Ach) provocation test for induction of CAS. CAS was defined as 〉 70% luminal narrowing of coronary arteries during Ach provocation test. The results of Ach provocation test were compared among age groups; 〈 45 years (Group 1), 45-54 years (Group 2), 55-64 years (Group 3), and 〉_ 65 years (Group 4). Results Older patients had higher incidence of hypertension, diabetes, but lower incidence rate of current smoking, male sex compared with younger patients. Positive Ach provocation test finding was frequently showed with aging (47.36% vs. 58.3% vs. 62.6% vs. 61.5%; P 〈 0.001). Multivariate logistic analysis showed that age, male, and myocardial bridge were independent predictors of CAS induced by Ach provocation test. Conclusion Our present study showed that old age was independent predictor for Ach-induced significant coronary artery spasm.展开更多
Background The influence of homocysteine (Hcy) on the migration and proliferation of vascular smooth muscle cells has been well established. However, the impact of Hcy levels on the progression of non-culprit corona...Background The influence of homocysteine (Hcy) on the migration and proliferation of vascular smooth muscle cells has been well established. However, the impact of Hcy levels on the progression of non-culprit coronary lesions (NCCLs) is controversial. This study aims to evaluate whether the plasma level of Hcy is related to the progression of NCCLs after percutaneous coronary stent implantation in elderly patients with acute coronary syndrome (ACS). Methods A total of 223 elderly patients (〉 65 years old) with ACS undergoing stent im- plantation and follow-up coronary angiography were enrolled. Laboratory determination comprised of blood sample evaluation for Hcy was carried out before baseline coronary intervention. The patients were classified into two groups according to the blood Hcy tertiles (〉 15 mmol/L or 〈 15 mmol/L). Patients were followed up for 12.2 months. NCCL progression was assessed by three-dimensional quantitative coronary angiography. Results A significantly higher ratio of NCCL progression was observed in the group with baseline Hcy concentrations above 15 mmol/L compared to the group with concentrations below 15 mmol/L (41/127, 32.3% vs. 14/96, 14.6%, P = 0.002). Multivariate Cox regression analysis showed that Hcy and diabetes mellitus were independent risk factors for NCCL progression. The crude haz- ard ratio (HR) of NCCL progression for Hcy level was 1.056 (95% CI: 1.01-1.104, P = 0.015). The adjusted HR of NCCL progression for Hcy level was 1.024 (95% CI: 1.007-1.042, P = 0.007). The adjusted HR of NCCL progression for diabetes mellitus was 1.992 (95% CI: 1.15-3.44, P = 0.013). Conclusions Hcy is an independent risk factor for NCCL progression after 12 months of follow-up in elderly patients with ACS who has undergone percutaneous coronary stenting.展开更多
Age is an important prognostic factor in the outcome of acute coronary syndromes (ACS). A substantial percentage of patients who ex- perience ACS is more than 75 years old, and they represent the fastest-growing seg...Age is an important prognostic factor in the outcome of acute coronary syndromes (ACS). A substantial percentage of patients who ex- perience ACS is more than 75 years old, and they represent the fastest-growing segment of the population treated in this setting. These pa- tients present different patterns of responses to pharmacotherapy, namely, a higher ischemic and bleeding risk than do patients under 75 years of age. Our aim was to identify whether the currently available ACS ischemic and bleeding risk scores, which has been validated for the general population, may also apply to the elderly population. The second aim was to determine whether the elderly benefit more from a spe- cific pharmacological regimen, keeping in mind the numerous molecules of antiplatelet and antithrombotic drugs, all validated in the general population. We concluded that the GRACE (Global Registry of Acute Coronary Events) risk score has been extensively validated in the elderly. However, the CRUSADE (Can Rapid risk stratification of Unstable angina patients Suppress ADverse outcomes with Early imple- mentation of the ACC/AHA Guidelines) bleeding score has a moderate correlation with outcomes in the elderly. Until now, there have not been head-to-head scores that quantify the ischemic versus hemorrhagic risk or scores that use the same end point and timeline (e.g., ischemic death rate versus bleeding death rate at one month). We also recommend that the frailty score be considered or integrated into the current existing scores to better quantify the overall patient risk. With regard to medical treatment, based on the subgroup analysis, we identified the drugs that have the least adverse effects in the elderly while maintaining optimal efficacy.展开更多
Under the background of China's aging population, home care service system in line with China's traditional family pension, pension also incorporates community features, is widely used in China at this stage of pens...Under the background of China's aging population, home care service system in line with China's traditional family pension, pension also incorporates community features, is widely used in China at this stage of pension model. However, the home care service research stage and the organic unity of the people did not do standard, local awareness and global perspective, often blindly follow the tide of globalization. Article by home care services, people-based, local and global vision of the concept of consciousness and its relationship to reports, summarized the research stage of home care service should be how to achieve unity of the three.展开更多
Objective The sex hormone and the corresponding receptor may play some roles in the development of the metabolic syndrome (MS) in the elderly men. This study was designed to examine the relationship of level of the ...Objective The sex hormone and the corresponding receptor may play some roles in the development of the metabolic syndrome (MS) in the elderly men. This study was designed to examine the relationship of level of the sex hormone and androgen receptor with MS in elderly men, thus to investigate the possible pathogenesis of MS. Methods This cross sectional study enrolled 587 elderly men, including 400 healthy controlls aged 62-92 years and 187 MS patients aged 60-87 years in Wan Shou Lu area of Beijing city. Dehydroepiandrosterone sulfate (DHAE-S), total testosterone (TT), sex hormone binding globulin (SHBG), free testosterone (FT), follicle-stimulating hormone (FSH),Estradiol (E2),luteinizing hormone(LH) and androgen receptor (AR) in blood were tested. Statistical analyses included the comparison analysis of variables and independent variables, correlation analysis using multi-factor linear regression, and multiple logistic regression analysis. Results DHAE-S, TT, SHBG, FT and AR fluorescence intensity in healthy control group were higher than those in MS group, however, FSH and E2 levels were lower in healthy group. Age was negatively correlated with diastolic blood pressure (DBP) and FT, but positively correlated with systolic blood pressure (SBP) and E2. AR fluorescence intensity was negatively correlated with SBP and LH. The logistic regression equation showed the negative correlation between DHEA-S, SHBG and the development of MS. Conclusions There are low levels of DHEA-S, TT, SHBG, FT and AR in the elderly patients with MS. On the contrary, FSH and E2 concentration are higher. It can be suggested that low levels of DHEA-S and SHBG may be the potential risk factors of MS in elderly men.展开更多
Background Echocardiography has been shown to be a valuable resource in the diagnosis of many cardiac conditions, and can be used in all age groups, from the fetus to the oldest old. In the context of an increasingly ...Background Echocardiography has been shown to be a valuable resource in the diagnosis of many cardiac conditions, and can be used in all age groups, from the fetus to the oldest old. In the context of an increasingly aging population, the impact and utility of echocar- diography in centenarians is largely unknown. This study is to determine whether echocardiography in centenarians aids in making clinical patient management decisions. Methods A retrospective review of echocardiograms from 1986 to 2014, at two affiliated tertiary centers, in individuals who were 100 years or older at the time of the examination. Patient and echocardiogram characteristics, management decisions based on echocardiography, and mortality were documented. Results 114 centenarians had echocardiograms, with ages ranging from 100 to 107 years (101 - 1.4 years). In 82 of the centenarians evaluated (72%), no changes in management occurred as a consequence of the echocardiogram. From all management changes directly related to the echocardiogram, 81% (n = 26) of these corresponded to medication adjustments; interventional or surgical procedures followed the echocardiogram only in 4% (n = 5) of the total number of centenarians. Echocardiogram-based changes in management were only significant in patients that were referred for congestive heart failure (P = 0.02). After the echocardiogram was performed, 1-month and 1-year mortality were 15% and 47%, respectively. The median survival after the echocardiogram was obtained was 13 months (range 0.03 to 145 months), with no difference if there was a change or no change in manage- ment (P = 0.21). Conclusions Among centenarians undergoing echocardiography, despite additional diagnostic information, echocardio- grams in centenarians influence management in a minority of cases, most commonly in the form of medication changes for treatment of heart failure. A significant proportion of centenarians are deceased within a year of undergoing echocardiographic assessment. These findings may question the overall utility of echocardiography in these late survivors.展开更多
Backgrounds Pulmonary arterial hypertension (PAH) was previously considered an illness that affects mostly the young, but now it is also increasingly recognized in the elderly. The aim of this study was to compare t...Backgrounds Pulmonary arterial hypertension (PAH) was previously considered an illness that affects mostly the young, but now it is also increasingly recognized in the elderly. The aim of this study was to compare the features of elderly versus younger patients diagnosed with PAH, and to define the prognostic factors which affect their long-term survival. Methods In this prospective, single center study, the clinical, echocardiographic, hemodynamic characteristics, and the outcomes of younger (18-65 years) and elderly (〉 65 years) patients with definitive diagnosis of precapillary PAIl were compared. Results A total of 119 patients were analyzed in this study; 43 were elderly (mean age: 71.5 ± 5.5 years), while 76 were non-elderly (mean age 44.5 ±15.2 years). During the mean follow-up duration of 26.8 ±25.0 months, 43 deaths occurred, 17 of which were among the elderly group, with 28 among non-elderly group. Comparison of baseline parameters showed that 6 min walking distance, hemoglobin levels, pulmonary artery pressures and pulmonary vascular resistance were significantly lower; and estimated glomerular filtration rate, body mass index, E/e' and pulmonary capillary wedge pressure were significantly higher in the elderly group than in the younger group. Survival analysis demonstrated that the independent predictors of death were tricuspid plane annular systolic excursion (TAPSE; HR: 1.272, 95% CI: 1.079-1.499, P = 0.004) and uric acid (HR: 1.291, 95% CI: 1.042-1.600, P = 0.019) in the elderly group. In contrast, in the non-elderly group, higher brain natriuretic peptide (HR: 1.002, 95% CI: 1.001-1.004, P 〈 0.001) and higher right atrial pressure (HR: 1.128, 95% CI: 1.026-1.241, P = 0.013) values were the only parameters associated with mortality. Conclusions Our data suggest that elderly PAH patients have a unique clinical and hemodynamic profile, with totally different prognostic markers compared to younger PAH patients.展开更多
Objective To evaluate the epicardial fat tissue thickness (EFTT) as a diagnostic criterion for geriatric patients with metabolic syn- drome (MetS). Methods Sixty geriatric patients over 65 years of age were recrui...Objective To evaluate the epicardial fat tissue thickness (EFTT) as a diagnostic criterion for geriatric patients with metabolic syn- drome (MetS). Methods Sixty geriatric patients over 65 years of age were recruited for the study. Patients were divided into two groups: Group 1 (n = 30) consisted of patients with MetS; Group 2 (n = 30) consisted of patients without MetS. Echocardiography was used to measure EFTT in all patients, and blood samples were analyzed for biochemical parameters. Results Compared to Group 2, EFTT levels of Group 1 were statistically higher (P 〈 0.05). In a binary logistic regression analysis, EFTT levels served as the independent factor for meta- bolic syndrome 03 = 17.35, SE = 4.93, Wald = 12.36, P 〈 0.001). Receivers operating characteristic Curve (ROC-curve) analysis revealed that EFTT predicted MetS with 96.7% sensitivity and 86.7% specificity above the level of 7.3 mm [area under the curve = 0.969; 95% con- fidence interval (CI): 0.928-1.00]. Conclusions The present study demonstrated that serum EFTT levels were higher in geriatric patients with MetS and can therefore be used as a diagnostic criterion for MetS.展开更多
Objective To compare hospital costs and clinical outcomes between transradial intervention (TRI) and transfemoral intervention (TFI) in elderly patients aged over 65 years. Methods We identified 1229 patients ag...Objective To compare hospital costs and clinical outcomes between transradial intervention (TRI) and transfemoral intervention (TFI) in elderly patients aged over 65 years. Methods We identified 1229 patients aged over 65 years who underwent percutaneous coronary intervention (PCI) in Fuwai Hospital, Beijing, China, between January 1 and December 31, 2010. Total hospital costs and in-hospital outcomes were compared between TRI and TFI. An inverse probability weighting (IPW) model was introduced to control potential biases. Results Patients who underwent TRI were younger, less often female, more likely to receive PCI for single-vessel lesions, and less likely to undergo the procedure for ostial lesions. TRI was associated with a cost saving of CNY7495 (95%CI: CNY4419-10 420). Such differences were mainly driven by lower PCI-related costs. TRI patients had shorter length of stay (1.9 days, 95%CI: 1.1-2.7 days), shorter post-procedural stay (0.7 days, 95%CI: 0.3-1.1 days), and fewer major adverse cardiac events (adjusted odds ratio = 0.47, 95%CI: 0.31-0.73). There was no statistical significance in the incidence of post-PCI bleeding between TRI and TFI (P〉0.05). Such differences remained consistent in clinically relevant subgroups of acute myocardial infarction, acute coronary syndrome, and stable angina. Conclusion The use of TRI in patients aged over 65 years was associated with significantly reduced hospital costs and more favorable clinical outcomes.展开更多
The metabolic syndrome is common after liver transplant being present in approximately half of recipients. It has been associated with adverse outcomes such as progression of hepatitis C and major vascular events. As ...The metabolic syndrome is common after liver transplant being present in approximately half of recipients. It has been associated with adverse outcomes such as progression of hepatitis C and major vascular events. As the United States population ages and the rate of obesity increases, prevention of the metabolic syndrome in the post-transplant population deserves special consideration. Currently, the metabolic syndrome after transplant appears at least two times more common than observed rates in the general population. Specific guidelines for patients after transplant does not exist, therefore prevention rests upon knowledge of risk factors and the presence of modifiable elements. The current article will focus on risk factors for the development of the metabolic syndrome after transplant, will highlight potentially modifiable factors and propose potential areas for intervention. As in the non-transplant population, behavioral choices might have a major role. Opportunities exist in this regard for health prevention studies incorporating lifestyle changes. Other factors such as the need for immunosuppression, and the changing characteristics of wait listed patients are not modifiable, but are important to know in order to identify persons at higher risk. Although immunosuppression after transplant is unavoidable, the contribution of different agents to the development of components of the metabolic syndrome is also discussed. Ultimately, an increased risk of the metabolic syndrome after transplant is likely unavoidable, however, there are many opportunities to reduce the prevalence.展开更多
Geriatric patients affected by stable multi-vessel coronary artery disease (CAD) are at the crossroad: they can live with the risks of acute coronary syndrome, malignant arrhythmias or heart failure, or they can un...Geriatric patients affected by stable multi-vessel coronary artery disease (CAD) are at the crossroad: they can live with the risks of acute coronary syndrome, malignant arrhythmias or heart failure, or they can undergo a rapid evaluation for myocardial revascularization.展开更多
文摘A stochastic model of conducting crack propagation is presented to provide a conceptual framework dedicated to the study of the formation of fractal structure of dielectric ageing patterns as a result of a competition between random fluctuation growth and applied electric strength enhanced deterministic growth. The necessary and sufficient conditions resulting in fractal behaviour in dielectric ageing are found.
文摘Background Frailty is a new prognostic factor in cardiovascular medicine due to the aging and increasingly complex nature of elderly patients. It is useful and meaningful to prospectively analyze the manner in which frailty predicts short-term outcomes for elderly patients with acute coronary syndrome (ACS). Methods Patients aged 〉 65 years, with diagnosis of ACS from cardiology department and geriatrics department were included from single-center. Clinical data including geriatrics syndromes were collected using Comprehensive Geriatrics Assessment. Frailty was defined according to the Clinical Frailty Scale and the impact of the co-morbidities on risk was quantified by the coronary artery disease (CAD)--specific index. Patients were followed up by clinical visit or telephone consultation and the median follow-up time is 120 days. Following-up items included all-cause mortality, unscheduled return visit, in-hospital and recurrent major adverse cardiovascular events. Multivariable regression survival analysis was performed using Cox regression. Results Of the 352 patients, 152 (43.18%) were considered frail according to the study instrument (5-7 on the scale), and 93 (26.42%) were considered moderately or se- verely frail (6-7 on the scale). Geriatrics syndromes including incontinence, fall history, visual impairment, hearing impairment, constipation, chronic pain, sleeping disorder, dental problems, anxiety or depression, and delirium were more frequently in frail patients than in non-frail patients (P = 0.000, 0.031, 0.009, 0.014, 0.000, 0.003, 0.022, 0.000, 0.074, and 0.432, respectively). Adjusted for sex, age, severity of coro- nary artery diseases (left main coronary artery lesion or not) and co-morbidities (CAD specific index) by Cox survival analysis, frailty was found to be strongly and independently associated with risk for the primary composite outcomes: all-canse mortality [Hazard Ratio (HR) = 5.393; 95% CI: 1.477-19.692, P = 0.011] and unscheduled return visit (HR - 2.832; 95% CI: 1.140-7.037, P = 0.025). Conclusions Comprehensive Geriatrics Assessment and Clinical Frail Scale were useful in evaluation of elderly patients with ACS. Frailty was strongly and independently associated with short-term outcomes for elderly patients with ACS.
文摘Cardiovascular disease, and in particular ischemic heart disease (IHD), is a major cause of morbidity and mortality in the very elderly (〉 80 years) worldwide. These patients represent a rapidly growing cohort presenting for percntaneous coronary intervention (PCI), now constituting more than one in five patients treated with PCI in real-world practice. Furthermore, they often have greater ischemic burden than their younger counterparts, suggesting that they have greater scope of benefit from coronary revascularization therapy. Despite this, the very elderly are frequently under-represented in clinical revascularization trials and historically there has been a degree of physician reluctance in referring them for PCI procedures, with perceptions of disappointing outcomes, low success and high complication rates. Several issues have contributed to this, including the tendency for older patients with IHD to present late, with atypical symptoms or non-diagnostic ECGs, and reservations regarding their procedural risk-to-benefit ratio, due to shorter life expectancy, presence of comorbidities and increased bleeding risk from antiplatelet and anticoagulation medications. However, advances in PCI technology and techniques over the past decade have led to better outcomes and lower risk of complications and the existing body of evidence now indicates that the very elderly actually derive more relative benefit from PCI than younger populations. Importantly, this applies to all PCI settings: elective, urgent and emergency. This review discusses the role of PCI in the very elderly presenting with chronic stable IHD, non ST-elevation acute coronary syndrome, and ST-elevation myocardial infarction. It also addresses the clinical challenges met when considering PCI in this cohort and the ongoing need for research and development to further improve outcomes in these challenging patients.
文摘1 Introduction Ischemic heart disease is caused by atherosclerotic and/or thrombotic obstruction of coronary arteries. Clinical spec- trum of ischemic heart disease expands from asymptomatic atherosclerosis of coronary arteries to acute coronary syn- dromes (ACS) including unstable angina, acute myocardial infarction (non-ST elevation myocardial infarction and ST elevation myocardial infarction). Stable ischemic heart dis- ease (SIHD) refers to patients with known or suspected SIHD who have no recent or acute changes in their symp- tomatic status, suggesting no active thrombotic process is underway.
文摘Coronary heart disease remains the leading cause of death in the developed world. Advanced age is the single strongest risk factor for coronary artery disease (CAD) and independent predictor for poor outcomes following an acute coronary syndrome (ACS). ACS refers to a spectrum of conditions compatible with acute myocardial ischemia and/or infarction due to various degrees of reduction in co- ronary blood flow as a result of plaque rupture/erosion and thrombosis formation or supply and demand mismatch.
文摘Chronic heart failure (CHF) is a complex clinical syndrome resulting from inefficient myocardial pumping, and is characterised by a typical progressively deteriorating trajectory punctuated by serious episodes of acute disease decompensation.High prevalence of hospital admission has been reported.[2] However, around 40% of hospital admissions was avoidable if patients demonstrate consistent self-care.
文摘Objective To investigate the relationship among serum vitamin D levels, physical performance impairment, and geriatric syndromes in elders with hypertension. Methods According to the concentration of vitamin D levels, a total of 143 elderly patients with hypertension were classified into vitamin D deficient group (vitamin D 〈 20 ng/mL, n = 94) and vitamin D appropriate group (vitamin D 〉 20 ng/rnL, n = 49). Geriatric syndromes and physical performance were assessed by using comprehensive geriatric assessment (CGA). Correlation among vitamin D levels, geriatric syndromes and physical performance was analyzed. Results No statistical differences were found in various aspects of geriatric syndromes between the two groups (P 〉 0.05). While correlation analysis indicated that vitamin D levels had a positive association with ADL score (r = 0.235, P 〈 0.01) and a negative association with Morse fall scale score (r = 0.238, P 〈 0.01). Patients with deficient vitamin D level had longer time both in the Five Time Sit to Stand Test (5tSTS), (15.765 ± 5.593) and the four-meter walk test [7.440 (5.620, 9.200)], a weaker hand-grip in the grip strength test (28.049 ± 9.522), and a lower Tinetti performance-oriented mobility assessment (Tinetti POMA) [26 (22, 27)] and Balance subscale of the Tinetti performance-oriented mobility assessment (B-POMA) score [ 14 (12, 16)], compared with appropriate vitamin D level [(13.275 ± 3.692); 5.810 (4.728, 7.325)]; (31.989 ± 10.217); [26.5 (25, 28)]; [15 (14, 16), respectively, all P 〈 0.05]. Furthermore, results of logistic regression indicated that vitamin D was significantly associated with 5tSTS (OR = 1.2, 95% CI = 1.050-1.331, P 〈 0.01), Tinetti POMA (OR = 3.7, 95% CI:1.284-10.830, P 〈 0.05) and B-POMA (OR = 0.8, 95% CI:0.643-0.973, P 〈 0.05). Conclusions In elderly hypertensive patients, serum vitamin D deficient level is associated with physical performance impairment. However, no statistical significance was found between vitamin D and geriatric syndromes. Further study is required to investigate possible mechanisms for the association between vitamin D and physical performance.
文摘The increasing population in older age will lead to greater numbers of them presenting with acute coronary syndromes (ACS). This has implications on global healthcare resources and necessitates better management and selection for evidenced-based therapies. The elderly are a high risk group with more significant treatment benefits than younger ACS. Nevertheless, age related inequalities in ACS care are recognised and persist. This discrepancy in care, to some extent, is explained by the higher frequency of atypical and delayed presentations in the elderly, and less diagnostic electrocardiograms at presentation, potentiating a delay in ACS diagnosis. Under estimation of mortality risk in the elderly due to limited consideration for physiological tiailty, co-morbidity, cognitive/psychological impairment and physical disability, less input by cardiology specialists and lack of randomised, controlled trials data to guide management in the elderly may further confound the inequality of care. While these inequalities exist, there remains a substantial opportunity to improve age related ACS outcomes. The selection of elderly patients for specific therapies and medication regimens are unanswered. There is a growing need for randomised, controlled trial data to be more representative of the population and enroll those of advanced age with co-morbidity. A lack of reporting of adverse events, such as renal impairment post coronary angiography, in the elderly further limit risk benefit decisions. Substantial improvements in care of elderly ACS patients are required and should be advocated. Ultimately, these improvements are likely to lead to better outcomes post ACS. However, the improvement in outcome is not infinite and will be limited by non-modifiable factors of age-related risk.
文摘Background Smoking and other risk factors have been well known as important factors of variant angina or coronary artery spasm (CAS). However, clinical features related to age on coronary artery spasm have been rarely evaluated. Methods We evaluated 3155 consecutive patients with insignificant coronary artery lesion. Patients underwent Acetylcholine (Ach) provocation test for induction of CAS. CAS was defined as 〉 70% luminal narrowing of coronary arteries during Ach provocation test. The results of Ach provocation test were compared among age groups; 〈 45 years (Group 1), 45-54 years (Group 2), 55-64 years (Group 3), and 〉_ 65 years (Group 4). Results Older patients had higher incidence of hypertension, diabetes, but lower incidence rate of current smoking, male sex compared with younger patients. Positive Ach provocation test finding was frequently showed with aging (47.36% vs. 58.3% vs. 62.6% vs. 61.5%; P 〈 0.001). Multivariate logistic analysis showed that age, male, and myocardial bridge were independent predictors of CAS induced by Ach provocation test. Conclusion Our present study showed that old age was independent predictor for Ach-induced significant coronary artery spasm.
文摘Background The influence of homocysteine (Hcy) on the migration and proliferation of vascular smooth muscle cells has been well established. However, the impact of Hcy levels on the progression of non-culprit coronary lesions (NCCLs) is controversial. This study aims to evaluate whether the plasma level of Hcy is related to the progression of NCCLs after percutaneous coronary stent implantation in elderly patients with acute coronary syndrome (ACS). Methods A total of 223 elderly patients (〉 65 years old) with ACS undergoing stent im- plantation and follow-up coronary angiography were enrolled. Laboratory determination comprised of blood sample evaluation for Hcy was carried out before baseline coronary intervention. The patients were classified into two groups according to the blood Hcy tertiles (〉 15 mmol/L or 〈 15 mmol/L). Patients were followed up for 12.2 months. NCCL progression was assessed by three-dimensional quantitative coronary angiography. Results A significantly higher ratio of NCCL progression was observed in the group with baseline Hcy concentrations above 15 mmol/L compared to the group with concentrations below 15 mmol/L (41/127, 32.3% vs. 14/96, 14.6%, P = 0.002). Multivariate Cox regression analysis showed that Hcy and diabetes mellitus were independent risk factors for NCCL progression. The crude haz- ard ratio (HR) of NCCL progression for Hcy level was 1.056 (95% CI: 1.01-1.104, P = 0.015). The adjusted HR of NCCL progression for Hcy level was 1.024 (95% CI: 1.007-1.042, P = 0.007). The adjusted HR of NCCL progression for diabetes mellitus was 1.992 (95% CI: 1.15-3.44, P = 0.013). Conclusions Hcy is an independent risk factor for NCCL progression after 12 months of follow-up in elderly patients with ACS who has undergone percutaneous coronary stenting.
文摘Age is an important prognostic factor in the outcome of acute coronary syndromes (ACS). A substantial percentage of patients who ex- perience ACS is more than 75 years old, and they represent the fastest-growing segment of the population treated in this setting. These pa- tients present different patterns of responses to pharmacotherapy, namely, a higher ischemic and bleeding risk than do patients under 75 years of age. Our aim was to identify whether the currently available ACS ischemic and bleeding risk scores, which has been validated for the general population, may also apply to the elderly population. The second aim was to determine whether the elderly benefit more from a spe- cific pharmacological regimen, keeping in mind the numerous molecules of antiplatelet and antithrombotic drugs, all validated in the general population. We concluded that the GRACE (Global Registry of Acute Coronary Events) risk score has been extensively validated in the elderly. However, the CRUSADE (Can Rapid risk stratification of Unstable angina patients Suppress ADverse outcomes with Early imple- mentation of the ACC/AHA Guidelines) bleeding score has a moderate correlation with outcomes in the elderly. Until now, there have not been head-to-head scores that quantify the ischemic versus hemorrhagic risk or scores that use the same end point and timeline (e.g., ischemic death rate versus bleeding death rate at one month). We also recommend that the frailty score be considered or integrated into the current existing scores to better quantify the overall patient risk. With regard to medical treatment, based on the subgroup analysis, we identified the drugs that have the least adverse effects in the elderly while maintaining optimal efficacy.
文摘Under the background of China's aging population, home care service system in line with China's traditional family pension, pension also incorporates community features, is widely used in China at this stage of pension model. However, the home care service research stage and the organic unity of the people did not do standard, local awareness and global perspective, often blindly follow the tide of globalization. Article by home care services, people-based, local and global vision of the concept of consciousness and its relationship to reports, summarized the research stage of home care service should be how to achieve unity of the three.
文摘Objective The sex hormone and the corresponding receptor may play some roles in the development of the metabolic syndrome (MS) in the elderly men. This study was designed to examine the relationship of level of the sex hormone and androgen receptor with MS in elderly men, thus to investigate the possible pathogenesis of MS. Methods This cross sectional study enrolled 587 elderly men, including 400 healthy controlls aged 62-92 years and 187 MS patients aged 60-87 years in Wan Shou Lu area of Beijing city. Dehydroepiandrosterone sulfate (DHAE-S), total testosterone (TT), sex hormone binding globulin (SHBG), free testosterone (FT), follicle-stimulating hormone (FSH),Estradiol (E2),luteinizing hormone(LH) and androgen receptor (AR) in blood were tested. Statistical analyses included the comparison analysis of variables and independent variables, correlation analysis using multi-factor linear regression, and multiple logistic regression analysis. Results DHAE-S, TT, SHBG, FT and AR fluorescence intensity in healthy control group were higher than those in MS group, however, FSH and E2 levels were lower in healthy group. Age was negatively correlated with diastolic blood pressure (DBP) and FT, but positively correlated with systolic blood pressure (SBP) and E2. AR fluorescence intensity was negatively correlated with SBP and LH. The logistic regression equation showed the negative correlation between DHEA-S, SHBG and the development of MS. Conclusions There are low levels of DHEA-S, TT, SHBG, FT and AR in the elderly patients with MS. On the contrary, FSH and E2 concentration are higher. It can be suggested that low levels of DHEA-S and SHBG may be the potential risk factors of MS in elderly men.
文摘Background Echocardiography has been shown to be a valuable resource in the diagnosis of many cardiac conditions, and can be used in all age groups, from the fetus to the oldest old. In the context of an increasingly aging population, the impact and utility of echocar- diography in centenarians is largely unknown. This study is to determine whether echocardiography in centenarians aids in making clinical patient management decisions. Methods A retrospective review of echocardiograms from 1986 to 2014, at two affiliated tertiary centers, in individuals who were 100 years or older at the time of the examination. Patient and echocardiogram characteristics, management decisions based on echocardiography, and mortality were documented. Results 114 centenarians had echocardiograms, with ages ranging from 100 to 107 years (101 - 1.4 years). In 82 of the centenarians evaluated (72%), no changes in management occurred as a consequence of the echocardiogram. From all management changes directly related to the echocardiogram, 81% (n = 26) of these corresponded to medication adjustments; interventional or surgical procedures followed the echocardiogram only in 4% (n = 5) of the total number of centenarians. Echocardiogram-based changes in management were only significant in patients that were referred for congestive heart failure (P = 0.02). After the echocardiogram was performed, 1-month and 1-year mortality were 15% and 47%, respectively. The median survival after the echocardiogram was obtained was 13 months (range 0.03 to 145 months), with no difference if there was a change or no change in manage- ment (P = 0.21). Conclusions Among centenarians undergoing echocardiography, despite additional diagnostic information, echocardio- grams in centenarians influence management in a minority of cases, most commonly in the form of medication changes for treatment of heart failure. A significant proportion of centenarians are deceased within a year of undergoing echocardiographic assessment. These findings may question the overall utility of echocardiography in these late survivors.
文摘Backgrounds Pulmonary arterial hypertension (PAH) was previously considered an illness that affects mostly the young, but now it is also increasingly recognized in the elderly. The aim of this study was to compare the features of elderly versus younger patients diagnosed with PAH, and to define the prognostic factors which affect their long-term survival. Methods In this prospective, single center study, the clinical, echocardiographic, hemodynamic characteristics, and the outcomes of younger (18-65 years) and elderly (〉 65 years) patients with definitive diagnosis of precapillary PAIl were compared. Results A total of 119 patients were analyzed in this study; 43 were elderly (mean age: 71.5 ± 5.5 years), while 76 were non-elderly (mean age 44.5 ±15.2 years). During the mean follow-up duration of 26.8 ±25.0 months, 43 deaths occurred, 17 of which were among the elderly group, with 28 among non-elderly group. Comparison of baseline parameters showed that 6 min walking distance, hemoglobin levels, pulmonary artery pressures and pulmonary vascular resistance were significantly lower; and estimated glomerular filtration rate, body mass index, E/e' and pulmonary capillary wedge pressure were significantly higher in the elderly group than in the younger group. Survival analysis demonstrated that the independent predictors of death were tricuspid plane annular systolic excursion (TAPSE; HR: 1.272, 95% CI: 1.079-1.499, P = 0.004) and uric acid (HR: 1.291, 95% CI: 1.042-1.600, P = 0.019) in the elderly group. In contrast, in the non-elderly group, higher brain natriuretic peptide (HR: 1.002, 95% CI: 1.001-1.004, P 〈 0.001) and higher right atrial pressure (HR: 1.128, 95% CI: 1.026-1.241, P = 0.013) values were the only parameters associated with mortality. Conclusions Our data suggest that elderly PAH patients have a unique clinical and hemodynamic profile, with totally different prognostic markers compared to younger PAH patients.
文摘Objective To evaluate the epicardial fat tissue thickness (EFTT) as a diagnostic criterion for geriatric patients with metabolic syn- drome (MetS). Methods Sixty geriatric patients over 65 years of age were recruited for the study. Patients were divided into two groups: Group 1 (n = 30) consisted of patients with MetS; Group 2 (n = 30) consisted of patients without MetS. Echocardiography was used to measure EFTT in all patients, and blood samples were analyzed for biochemical parameters. Results Compared to Group 2, EFTT levels of Group 1 were statistically higher (P 〈 0.05). In a binary logistic regression analysis, EFTT levels served as the independent factor for meta- bolic syndrome 03 = 17.35, SE = 4.93, Wald = 12.36, P 〈 0.001). Receivers operating characteristic Curve (ROC-curve) analysis revealed that EFTT predicted MetS with 96.7% sensitivity and 86.7% specificity above the level of 7.3 mm [area under the curve = 0.969; 95% con- fidence interval (CI): 0.928-1.00]. Conclusions The present study demonstrated that serum EFTT levels were higher in geriatric patients with MetS and can therefore be used as a diagnostic criterion for MetS.
文摘Objective To compare hospital costs and clinical outcomes between transradial intervention (TRI) and transfemoral intervention (TFI) in elderly patients aged over 65 years. Methods We identified 1229 patients aged over 65 years who underwent percutaneous coronary intervention (PCI) in Fuwai Hospital, Beijing, China, between January 1 and December 31, 2010. Total hospital costs and in-hospital outcomes were compared between TRI and TFI. An inverse probability weighting (IPW) model was introduced to control potential biases. Results Patients who underwent TRI were younger, less often female, more likely to receive PCI for single-vessel lesions, and less likely to undergo the procedure for ostial lesions. TRI was associated with a cost saving of CNY7495 (95%CI: CNY4419-10 420). Such differences were mainly driven by lower PCI-related costs. TRI patients had shorter length of stay (1.9 days, 95%CI: 1.1-2.7 days), shorter post-procedural stay (0.7 days, 95%CI: 0.3-1.1 days), and fewer major adverse cardiac events (adjusted odds ratio = 0.47, 95%CI: 0.31-0.73). There was no statistical significance in the incidence of post-PCI bleeding between TRI and TFI (P〉0.05). Such differences remained consistent in clinically relevant subgroups of acute myocardial infarction, acute coronary syndrome, and stable angina. Conclusion The use of TRI in patients aged over 65 years was associated with significantly reduced hospital costs and more favorable clinical outcomes.
文摘The metabolic syndrome is common after liver transplant being present in approximately half of recipients. It has been associated with adverse outcomes such as progression of hepatitis C and major vascular events. As the United States population ages and the rate of obesity increases, prevention of the metabolic syndrome in the post-transplant population deserves special consideration. Currently, the metabolic syndrome after transplant appears at least two times more common than observed rates in the general population. Specific guidelines for patients after transplant does not exist, therefore prevention rests upon knowledge of risk factors and the presence of modifiable elements. The current article will focus on risk factors for the development of the metabolic syndrome after transplant, will highlight potentially modifiable factors and propose potential areas for intervention. As in the non-transplant population, behavioral choices might have a major role. Opportunities exist in this regard for health prevention studies incorporating lifestyle changes. Other factors such as the need for immunosuppression, and the changing characteristics of wait listed patients are not modifiable, but are important to know in order to identify persons at higher risk. Although immunosuppression after transplant is unavoidable, the contribution of different agents to the development of components of the metabolic syndrome is also discussed. Ultimately, an increased risk of the metabolic syndrome after transplant is likely unavoidable, however, there are many opportunities to reduce the prevalence.
文摘Geriatric patients affected by stable multi-vessel coronary artery disease (CAD) are at the crossroad: they can live with the risks of acute coronary syndrome, malignant arrhythmias or heart failure, or they can undergo a rapid evaluation for myocardial revascularization.