REAL-TIME THREE-DIMENSIONAL ECHOCARDIOGRAPHY FOR QUANTIFYING LEFT VENTRICULAR MASS

To test the accuracy of real-time three-dimensional echocardiography (RT3DE) imaging system for evaluating left ventricular mass (LVM) in phantom and excised canine heart. Methods Ten left ventricular (LV) wall phantoms made of two rubber-bursas, ten excised canine hearts underwent RT3DE and two-dimensional echocardiography (2DE). In RT3DE "full volume" imaging, the myocardial volume was mea-sured using 2,4,8, and 16-plane method with the analysis software of RT3DE. Mass was then calculated by multiplying the resulting myocardial volume by specific density of myocardial tissue. In 2DE the masses were measured by area-length meth-od. The true LV wall phantom mass was measured by water displacement and the canine LVM was weighed by anatomy, which served as a reference standard. We compared RT3DE or 2DE with true mass. Results In LV wall phantoms, RT3DE correlated with true masses strongly (r = 0.813-0.994) and weakly correlated between 2DE and true masses (r = 0.628). In excised canine hearts, there is an excellent correlation between RT3DE and true masses (r = 0.764-0.991), while 2DE value showed a lesser correlation (r = 0.514). There are no difference between RT-3DE and true masses (P > 0.05) but different between 2DE and true masses (P < 0.05). In different planes, there was no difference between 8-plane and 16-plane (P > 0.05) but different between 8-plane and 2, 4-plane (P < 0.05). Conclusion RT3DE can accurately quantify LVM and provide a new tool to evaluate LV function. For LVM by RT3DE, 8-plane measurement method is the best choice for accuracy and convenience.

Combined Effects of Blood Pressure and Aldosterone on Cardiac Left Ventricular Mass Index—Ethnic Differences between Kazakh, Uygur and Han Subjects

Previous Background: Hemodynamic factors, like blood pressure, have been established to be major determinants of cardiac left ventricular structure. However, several factors other than blood pressure to influence cardiac mass have been implicated. When we did medical survey, cardiac left ventricular mass index (LVMI) of one ethnic group that had higher blood pressure was found to be smaller than that of the other ethnic groups with a lower blood pressure. Such contradicted data from the present study were analyzed combining blood pressure, LVMI and chemical parameters obtained from blood and urine. Methods: In a medical survey conducted in Xinjiang, China, 279 people (65 - 70 years old) from three ethnic groups (Kazakh, Uygur and Han) from two separated regions provided blood and urine samples and underwent echocardiography and 24-h ambulatory blood pressure monitoring (ABPM). Results: Systolic and diastolic blood pressure obtained from ABPM and urinary sodium excretion values were significantly higher in Kazakh than that in Uygur and Han. However, LVMI in Kazakh was lower than that in other 2 groups. Plasma aldosterone concentration (PAC) and plasma renin activity (PRA) were significantly lowest in Kazakh. The values of LVMI in all ethnic groups were positively related to both blood pressure and PAC. An inverse correlation was identified between PAC and urinary sodium excretion value. Conclusion: Although higher blood pressure in Kazakh subjects, their LVMI was lower than those of Uygur and Han, whose blood pressure was lower than that in Kazakh. These results suggest that blood pressure is not always a determinant for LVMI value. There is a possibility that relatively lower PAC resulted from higher sodium intake suppressed the rise in LVMI caused by higher blood pressure in Kazakh.

Study on the Effect of Simvastatin on Left Ventricular Mass and Endothelial Function and the Relationship between Their Changes in the Patients with Essential Hypertension

Objective:To study the effect of Simvastatin on the left ventricular mass and endothelial function and to investigate the relationship between their changes in the patients with essential hypertension(EH). Methods: 50 patients with hypertension without severe complication were divided into two groups in a randomized,controlled and single blind trial.Group I(n=25)were given Simvastatin and hydragogue for 12 weeks while Group Ⅱ were given hydragogue during the same time.We detected the left ventricular mass and the brachial artery dilatation induced by reactive hyperemia(DIRH)or nitroglycerin(DING)respectively with ultrasonography in all patients before and after treatment.25 normal subjects without any treatment were taken as the control. Results:The left ventricular mass index(LVMI)was higher in the two groups of patients[(133.61±31.02)g/m 2;(118.04±39.62)g/m 2]than that in the control(88.79±22.73)g/m 2 before treatment(P<0.01,0.000 1,respectively)while the blood pressure was higher.The DIRH was lower in the two groups of patients(5.93±2.24)%;(6.54±3.16)%than that in the control(13.09±2.99)%,P<0.000 1.There was no significantly differences in age,serum concentrations of total cholesterol,triglyceride,sugar,blood pressure or the DING between two groups of patients and the control(P>0.05).And there was no significant difference in the all variables between group Ⅰ and group Ⅱ before treatment.After treatment the LVMI decreased[(133.61±31.02)g/m 2 VS(91.07±16.01)g/m 2,P<0.01]and the DTRH increased[(5.93±2.24)% VS(13.53±2.38)%,P<0.01]in the patients of group Ⅰ while there was no significant change in LVMI and DIRH in the patients of group Ⅱ.The blood pressure in the two groups of patients was decreased to the normal.Compared with group Ⅱ,the changes of LVMI and DIRH was higher in patients of group Ⅰ though the serum concentrations of total cholesterol,triglyceride or sugar were not significantly different.No significant change in serum concentrations oftotal cholesterol,triglyceride or sugar was found during treatment in the two groups of patients.Analysis showed that the LVMI correlated with DIRH and the change of LVMI correlated better with the change of DIRH(r=-0.56;0.69,P<0.000 1,respectly). Conclusions: The increase of left ventricular mass was related with endothelial dysfunction in essential hypertension.Being independent of the changes of serum concentrations of total cholesterol,triglyceride or sugar and blood pressure,Simvastatin could inhibit the increase of left ventricular mass and improve endothelial function.

Hepcidin-25 negatively predicts left ventricular mass index in chronic kidney disease patients

AIM： To assess the correlation between the serum hep-cidin-25 level and left ventricular mass index.METHODS： This study was a cross-sectional study conducted between March 2009 and April 2010. Demo-graphic and biochemical data, including the serum hep-cidin-25 level, were collected for chronic kidney disease （CKD） patients. Two-dimensional echocardiography was performed to determine the left ventricle mass （LVM）, left ventricular mass index （LVMI）, interventricular septum thickness （IVSd）, left ventricle posterior wall thickness （LVPW）, right ventricular dimension （RVD）, left atrium （LA） and ejection fraction （EF）.RESULTS： A total of 146 patients with stage 1 to 5 CKD were enrolled. Serum hepcidin-25 levels were 16.51 ± 5.2, 17.59 ± 5.32, 17.38 ± 6.47, 19.98 ± 4.98 and 22.03 ± 4.8 ng/mL for stage 1 to 5 CKD patients, respectively. Hepcidin-25 level was independently pre-dicted by the serum ferritin level （β = 0.6, P = 0.002） and the estimated glomerular fltration rate （β = -0.48, P = 0.04）. There were negative correlations between the serum hepcidin level and the LVM and LVMI （ P = 0.04 and P = 0.005, respectively）. Systolic blood pressure （BP） was positively correlated with the LVMI （ P = 0.005）. In the multivariate analysis, a decreased serum hepci-din-25 level was independently associated with a higher LVMI （β = -0.28, 95%CI： -0.48 - -0.02, P = 0.006） after adjusting for body mass index, age and systolic BP.CONCLUSION： A lower serum hepcidin level is associ-ated with a higher LVMI in CKD patients. Low hepcidin levels may be independently correlated with unfavor-able cardiovascular outcomes in this population.

Is hepatic steatosis associated with left ventricular mass index increase in the general population?

AIM To investigate the association between hepatic steatosis and change in left ventricular mass index(LVMI) over five years, and examine whether systolic and diastolic blood pressures are mediators of the association between hepatic steatosis and LVMI using a general population sample.METHODS We analyzed data from the Study of Health in Pomerania. The study population comprised 1298individuals aged 45 to 81 years. Hepatic steatosis was defined as the presence of a hyperechogenic pattern of the liver together with elevated serum alanine transferase levels. Left ventricular mass was determined echocardiographically and indexed to height2.7. Path analyses were conducted to differentiate direct and indirect paths from hepatic steatosis to LVMI encompassing systolic and diastolic blood pressure as potential mediating variables.RESULTS Hepatic steatosis was a significant predictor for all measured echocardiographic characteristics at baseline. Path analyses revealed that the association of hepatic steatosis with LVMI change after five years was negligibly small(β =-0.12, s.e. = 0.21, P = 0.55). Systolic blood pressure at baseline was inversely associated with LVMI change(β =-0.09, s.e. = 0.03, P < 0.01), while no association between diastolic blood pressure at baseline and LVMI change was evident(β = 0.03, s.e. = 0.05, P = 0.56). The effect of the indirect path from hepatic steatosis to LVMI via systolic baseline blood pressure was small(β =-0.20, s.e. = 0.10, P = 0.07). No indirect effect was observed for the path via diastolic baseline blood pressure(β = 0.03, s.e. = 0.06, P = 0.60). Similar associations were observed in the subgroup of individuals not receiving beta-blockers, calcium channel blockers, or drugs acting on the reninangiotensin system.CONCLUSION Baseline associations between hepatic steatosis and LVMI do not extend to associations with LVMI change after five years. More studies are needed to study the longitudinal effects of hepatic steatosis on LVMI.

Higher Body Mass Index is an Independent Predictor of Left Atrial Enlargement

Background: The influence of obesity on the cardiac geometry is less clear. Our objective was to determine if body mass index (BMI) was an independent predictor of left atrial enlargement (LAE) relative to LV thickness, dimension and function. Methods: Retrospective analysis of 90 consecutive patients with available echocardiographic data was performed. Patients were categorized into those with LAE (defined as >4.0 cm in transverse dimension by M-mode, n = 36) and those with normal LA size (n = 54). The clinical and echocardiographic variables were compared between the two groups. Results: Compared to patients with normal LA size, patients with LAE had significantly higher BMI (32 ± 8 vsi ± 8, p = 0.006), greater LV thickness, increased LV cavity dimension, and depressed LV systolic function. BMI was a strong and independent predictor of LAE. Left ventricular thickness and LV end-diastolic (LVED) dimension were other independent predictors of LAE. After adjusting for the significant effects of LV thickness and LV diameter, every unit increase in BMI resulted in an 8% increase in the odds of having LAE. Conclusions: 1) Higher BMI is an independent predictor of LAE. 2) Presence of LV enlargement and LV systolic dysfunction in these patients suggests that in the face of higher BMI, cardiac workload may exceed the compensatory LV hypertrophy and 3) LAE may be a consequence of the greater force developed by the LA to fill the LV.

The Influence of Ethnicity in the Relationship between Sedentary Screen Time and Left Ventricular Mass: Insights from the MAG-SALVAGES

Background: The influence of race/ethnicity on the relationship between sedentary screen time and left ventricular mass has been recently suggested, but remains a subject of debate, and has never been explored in Africa. Purpose: To determine whether there is a racial/ethnic influence on the relationship between sedentary screen time and left ventricular mass in MAGhreb and Sub Saharan Africa Left-Ventricul ArGEometry Study (MAG-SALVAGES) participants. Methods: 100 blacks sub-Saharan African and 187 white Maghreb aged 18 - 55 years underwent an interview on their behavioral measures, physical activity and eating habits. Their left ventricular mass has also been measured by a resting transthoracic echography according to the American Society of Echography. Generalized linear models evaluated a test-for-trend across higher levels of sedentary screen time in progressive models with left ventricular measurements as dependent variables. The study population was stratified into quartiles of sedentary screen time (separately for whites and blacks) and examined the joint association of sedentary screen time and LVM within quartiles of physical activity. Results: Among White Maghreb, higher screen time was associated with smaller left ventricular mass (P Conclusions: Sedentary screen time is associated with smaller left ventricular mass in White Maghreb, not in black sub-Saharan African. The lack of association in blacks supports a potential qualitative difference in the cardiovascular consequences of sedentary screen based behavior.

Effects of Weight Loss on Pericardial Fat and Left Ventricular Mass Assessed with Cardiac Magnetic Resonance Imaging in Morbid Obesity

Background: Obesity is a risk factor for cardiovascular disease and mortality. Significant weight loss has beneficial effects on left ventricular structure, in particular on regression of left ventricular hypertrophy (LVH). We therefore evaluated the consequences of significant weight loss on left ventricular morphology, hemodynamics and pericardial fat. Methods: We performed volumetric cardiac magnetic resonance (CMR) imaging before and after significant weight loss due to laparoscopic adjustable gastric banding (LAGB). CMR was used to measure cardiac mass, volume and function, as well as to quantify pericardial fat. Results: Eleven patients (age 40.5 ± 10 yrs, body mass index 42.5 ± 3.9 kg/m2) underwent CMR imaging before and a median 15.4 months after gastric banding. The BMI declined by 9.3 ± 3.3 kg/m2 (p Discussion: Significant weight loss in obesity is accompanied by a marked regression of LVH, with no apparent change in cardiac volume or function. The local effect of a diminished amount of pericardiac fat tissue may be more important than absolute weight loss with respect to the regression of LVH in obesity.

Comparative Proteomic Analysis in Left Ventricular Remodeling following Myocardial Infarction in Rats

Objective Left ventricular remodeling （LVR） following myocardial infarction （MI） is a key pathophysiological process in which MI develops into heart failure. The exact mechanism of LVR remains unclear. We performed differential proteomic analysis on the myocardia of rats with LVR after MI, to explore the mechanism of ventricular remodeling after MI. Methods In the LVR group （n=12）, after the anterior descending coronary artery was ligated, the rats were fed for four weeks before the LVR models were established. Rats in the sham-operated group （n=11） underwent thread-drawing without ligation. The hemodynamic parameters, pathological findings, and proteomics were compared between the two groups. Results In the LVR group, the left ventricular end-diastolic pressure increased, the maximal left ventricular pressure increase/decrease ratio decreased significantly, and the left ventricular systolic pressure decreased. H-E staining and Masson staining of cardiac muscle tissues of the LVR group showed myocytolysis, disarray, and collagen proliferation. Twenty-one differentially expressed proteins were detected by proteomic analysis. We validated two proteins using western blot analysis. The differentially expressed proteins could be divided into six categories： energy metabolism-related proteins, cytoskeletal proteins, protein synthesis-related proteins, channel proteins, anti-oxidation- related proteins, and immune-related proteins. Conclusion These differentially expressed proteins might play key roles in LVR following M

Left Ventricular Measurements in Black Sub-Saharan Africans and White Maghreb

Background: Evidence that blacks have greater left ventricular mass (LVM) than whites has been demonstrated by large population-based American studies. However, to our knowledge, there is no study to date comparing LVM in Black Sub-Saharan Africans (BSSA) and the Maghreb white population. We compared LVM measured echocardiographically in asymptomatic BSSA and Maghreb. Methods and Results: A total of 100 asymptomatic BSSA and 189 Maghreb, (18 to 55 years old), underwent resting two-dimensional transthoracic echocardiography. LVM and geometry were assessed according to the 2015 American Society of Echocardiography and the European Association of Cardiovascular Imaging updated guidelines for cardiac chamber quantification. Crude or indexed LVM to body surface area or height2.7 was similar in BSSA and in Maghreb (132.7 ± 37.0 vs. 134.2 ± 35.7 g;73.1 ± 17.8 vs. 72.9 ± 16.2 g/m2;32.1 ± 9.8 vs. 33.6 ± 9.5 g/m2.7). However, the left ventricular posterior wall was thicker in BSSA. Patterns of left ventricular geometry (normal, concentric remodeling, or concentric or eccentric hypertrophy) were equally distributed among the two ethnic groups. Conclusions: Left ventricular posterior wall thickness but not LVM is greater in BSSA than in Maghreb.

Neutrino Mass Generation in SO(4) Model

Generation of neutrino mass in SO（4） model is proposed here. The algebraic structure of SO （4） is same as to that ofSU（2）L x SU（2）R. It is shown that the spontaneous symmetry breaking results three massive as well as three massless gauge bosons. The standard model theory according to which there exist three massive gauge bosons and a massless one is emerged from this model. In the framework ofSU（2）L x SU（2）R a small Dirac neutrino mass is derived. It is also shown that such mass term may vanish with a special choice. The Majorana mass term is not considered here and thus in this model the neutrino mass does not follow seesaw structure.

Correlation between IL-33/sST2 signaling pathway and patients with essential hypertensive left ventricular hypertrophy

Objective:To detect the levels of interleukin-33(IL-33)and soluble ST2(sST2)in peripheral blood of patients with essential hypertensive left ventricular hypertrophy,and to discusstheir correlation with patients with essential hypertensive left ventricular hypertrophy was further discussed.Methods:A total of 220 patients with essential hypertension treated in the Department of Cardiovascular Medicine of the First Affiliated Hospital of Bengbu Medical College were enrolled as the experimental group.According to left ventricular mass index(LVMI),patients with essential hypertension were divided into the non-left ventricular hypertrophy group(NLVH,n=108 cases)and the left ventricular hypertrophy group(LVH,n=112 cases).We used ELISA to detect the serum levels of IL-33 and sST2,the expression levels of IL-33 in peripheral blood lymphocytes of the NLVH group and the LVH group(60 cases each)were detected by Western blot,and the relationship between IL-33 and LVMI,a marker of left ventricular hypertrophic condition,was analyzed by Pearson.The relationship between IL-33,sST2 and left ventricular hypertrophy in essential hypertension was studied.Results:Compared with the NLVH group,the expression levels of IL-33 and sST2 in the LVH group were significantly increased.The results of Western blot showed that the expression level of IL-33 in the LVH group(1.07±0.08)was higher than that in the NLVH group(0.63±0.05)(P<0.05).Pearson correlation analysis showed that IL-33 was positively correlated with LVMI,sST2 was positively correlated with LVMI.Conclusion:The levels of IL-33 and sST2 in serum and the expression levels of IL-33 protein in peripheral blood lymphocytes are significantly increased in patients with hypertensive left ventricular hypertrophy,and the occurrence and development of essential hypertensive left ventricular hypertrophy may be related to IL-33 and sST2.

Generation of Lepton Masses Complementary to Higgs

A generation of bare lepton masses alternative to Higgs-like mechanisms is proposed. It can be used in a combination with the latter ones in attempt to explain why the coupling strengths to Higgs field span a wide range. The proposed mechanism also allows defining neutrino masses alternatively to the Dirac or Majorana types, since the effective bare masses of leptons are possible to generate without scalar terms in electroweak Lagrangians and motion equations. The proposed extension is fully compatible with standard methods of calculating radiative corrections and scattering amplitudes, since the left- and right-handed parts of EW Lagrangian do not change.

Contribution of Ambulatory Pulsed Pressure in the Modification of the Left Ventricular Geometry of the African Black People

Introduction-Purpose: Pulsed pressure is recognized as an important predictor of cardiovascular risk. The purpose of this study was to identify a possible association between high ambulatory pulsed pressure and left ventricular geometry change in African black people. Material and methods: We conducted a bicentric, retrospective descriptive and analytical study that took place from 2010 to 2015 at the Abidjan Heart Institute and the Polyclinic Sainte Anne Marie in Abidjan. The people were selected from MAPA’s archive files. Those aged 18 years and over were included, all of whom had valid echocardiography and MAPA. The analyzed parameters concerned epidemiological data with age, gender and body surface area. The clinical data analyzed included systolic, diastolic, mean and 24-hours pulsed pressures. On the echocardiographic parameters, it was the evaluation of the ventricular mass indexed to the body surface. Results: A total of 177 patients records were selected. The mean age of the patients was 56.32 ± 10.51 years. There was a male predominance with a sex ratio of 1.15. The main cardiovascular risk factors found outside high blood pressure were dyslipidemia (06.87%) and obesity (13.7%). In clinical terms, hypertension was found in 75% of cases (n = 133) versus 25% (n = 44) of normotensive patients. These blood pressure profiles allowed us to classify our study population into two groups: hypertensives people and normotensives people. The hypertensives people had significantly higher mean pulsed pressure levels than the normotensives people. All normotensive patients had normal pulsed pressure. In the hypertensive population, the prevalence of high pulsed pressure was 31% (n = 41) versus 69% (n = 92) normal pulsed pressure. Concerning the relationship between 24 hour ambulatory pulsed pressure and left ventricular mass, hypertensives patients with a high ambulatory pulsed pressure had a significantly higher average indexed ventricular mass than the opposite groups (p = 0.039). Their ejection fraction was significantly lower than those of the opposite populations (p = 0.000). On the analysis of the correlation between the left ventricular mass and the tension profile, we noted in our series, a strong and significant correlation (r = 0.6342;p = 0.0000) between pulsed pressure and the ventricular geometry change. Conclusion: High ambulatory pulsed pressure remains an independent factor of change in left ventricular geometry in black people.

慢性肾脏病非透析患者瘦组织质量/脂肪组织质量比值与左心室肥厚的关系

目的:探讨瘦组织质量(lean tissue mass,LTM)/脂肪组织质量(adipose tissue mass,ATM)比值对慢性肾脏病(chronic kidney disease,CKD)非透析患者左心室肥厚(left ventricular hypertrophy,LVH)的影响。方法:纳入CKD非透析患者417例,根据左心室重量指数(left ventricular mass index,LVMI)分为左心室正常组(Non-LVH组)240例、左心室肥厚组(LVH组)177例。收集基线资料及实验室指标等参数,同时收集超声心动图及生物电阻抗检测结果,比较两组之间的基线数据及LTM/ATM比值等数据。采用多因素Logistic回归分析CKD非透析患者LVH的危险因素。绘制受试者工作特征(receiver operating characteristic,ROC)曲线评价LTM/ATM对LVH的预测价值。结果:LVH组高血压患病率、年龄、女性比例、收缩压显著高于Non-LVH组,BMI、血红蛋白、血白蛋白、估算的肾小球滤过率(estimated Glomerular Filtration Rate,eGFR)显著低于Non-LVH组,差异均有统计学意义。LVH组LTM、瘦组织指数、LTM/ATM比值低于Non-LVH组,两组之间容量负荷差异无统计学意义。多因素Logistic回归分析显示年龄、BMI、收缩压、血红蛋白、LTM/ATM比值+性别均为CKD非透析患者LVH的独立危险因素。LTM/ATM比值+性别联合血红蛋白预测LVH的ROC曲线下面积为0.769。结论:低LTM/ATM比值为CKD非透析患者LVH的危险因素,该比值预测此类患者LVH的发生具有一定价值。

巨噬细胞移动抑制因子与原发性高血压患者左心室肥厚的关系

目的分析巨噬细胞移动抑制因子(MIF)与原发性高血压患者发生左心室肥厚(LVH)的关系,探讨MIF在原发性高血压患者发生左心室肥厚过程中的作用。方法以2019年1月至2020年9月期间在新疆医科大学第一附属医院心内科接受诊断和治疗的802例原发性高血压患者作为研究对象记录性别、民族、年龄、吸烟史、饮酒史、收缩压、舒张压、体质量指数、心脏超声参数等指标,通过ELISA方法检测血清MIF水平。根据Devereux公式计算左心室质量(LVM)和左心室质量指数(LVMI),并根据LVMI水平(男性>125 g/m^(2)、女性>120 g/m^(2))将患者分为左心室肥厚组(136例)和非肥厚组(666例)。绘制散点图并采用Sperman相关分析MIF与LVM和LVMI的关联。采用多因素logistic回归分析高血压患者发生LVH的影响因素;绘制ROC曲线,评估MIF预测高血压患者发生LVH的效能。结果肥厚组的MIF水平高于非肥厚组,差异具有统计学意义[124.77(79.05,141.58)ng/ml比69.07(51.76,88.08)ng/ml,P<0.05]。此外,肥厚组的男性比例、冠心病病史比例、年龄、高血压病程、收缩压水平均高于非肥厚组(P<0.05)。Sperman相关性分析结果显示,MIF与LVM、LVMI呈正相关(r分别为0.270、0.320)。多因素logistic回归分析结果表明,MIF(OR=1.029,95%CI 1.023~1.036,P<0.001)、收缩压(OR=1.013,95%CI 1.003~1.024,P=0.013)、男性(OR=1.997,95%CI 1.169~3.472,P=0.012)、饮酒(OR=0.356,95%CI 0.173~0.704,P=0.004)是高血压患者发生LVH的影响因素。ROC曲线结果显示,MIF预测高血压患者发生LVH的曲线下面积(AUC)为0.777(95%CI 0.725~0.829,P<0.001)。结论MIF与原发性高血压患者左心室肥厚存在关联,提示MIF可能参与高血压影响心脏功能的过程。

甘油三酯-葡萄糖乘积指数与女性非糖尿病高血压左心室肥厚的相关性探讨

目的:探讨女性非糖尿病高血压患者甘油三酯-葡萄糖乘积(TyG)指数与左心室肥厚(LVH)的相关性。方法:回顾分析133名女性非糖尿病高血压患者,采用Pearson相关性分析与左室质量指数(LVMI)相关的因素,通过二元logistic回归分析获得LVH的影响因素,并通过ROC曲线分析TyG指数预测LVH的最佳截断值以及灵敏度和特异度。结果:在女性非糖尿病高血压患者中,与TyG指数低值组比较,TyG指数高值组其LVMI也较高。Pearson相关性分析发现LVMI与TyG指数、收缩压及夜间舒张压呈正相关(P<0.05)。二元Logistic回归分析显示,TyG指数和夜间收缩压是LVH的预测因素(OR=3.486,95%CI:1.417~8.577;OR=1.048,95%CI:1.019~1.077)。TyG指数与夜间收缩压联合预测LVH的AUC为0.75(95%CI:0.659~0.847),灵敏度为64.7%,特异度为76.8%。结论:在女性非糖尿病高血压患者中,TyG指数和夜间收缩压与左室质量指数呈正相关,可以作为左心室肥厚的预测因子。

急性心肌梗死患者左心室重构与冠状动脉微循环及预后的相关性

目的在急性ST段抬高型心肌梗死(ST-segment elevation myocardial infarction,STEMI)且行直接经皮冠状动脉介入(primary percutaneous coronary intervention,pPCI)治疗患者中研究以左心室质量指数(left ventricular mass index,LVMI)为代表的左心室重构与以冠状动脉(冠脉)造影微循环阻力指数(angio-IMR,AMR)为代表的微循环障碍及预后的关系。方法本研究是回顾性病例对照研究,纳入2018年3月至2020年12月于广东省人民医院、广东省人民医院珠海分院和2021年11月至2022年1月于博罗县人民医院确诊STEMI且行pPCI治疗的患者,在术后及3个月后分别行超声心动图检查,计算患者LVMI变化百分比,根据LVMI变化量是否>20%分为高左心室重构组(n=62)、低左心室重构组(n=99)。通过对比两组的一般情况、冠脉微循环指标及预后情况,评价其之间的相关性及结局变量。结果(1)高左心室重构组比低左心室重构组AMR更高(287±89 vs.247±56,P=0.006),冠脉血流速度(coronary flow velocity,CFV)更慢(14.6±5.8 vs.16.6±5.3,P<0.05),预后更差(33.8%vs.13.1%,P=0.003)。LVMI绝对变化量与AMR呈正相关、线性关系(r=0.169,P=0.032)。无复流仅存在于高左心室重构组[3(4.8%)vs.0,P=0.027]。(2)Logistic回归分析表明AMR是LVMI变化量大于20%的危险因素(OR=1.008,P=0.001)。AMR是左心室重构的独立预测因子。受试者工作特征曲线(receiver operating characteristic curve,ROC)分析AMR切点为268.5。结论STEMI患者行pPCI治疗以LVMI为代表的左心室重构与以AMR为代表的冠脉微循环有明确关系,左心室重构变化越大,AMR越大,预后更差。

不良生活习惯对不同性别高血压患者左心房重构的影响

目的探讨不良生活习惯对不同性别高血压患者左心房重构的影响。方法将1241例高血压患者分为3组,正常体重组[身体质量指数(BMI)<24 kg/m^(2),n=422],超重组(24 kg/m^(2)≤BMI<28 kg/m^(2),n=633),肥胖组(BMI≥28 kg/m^(2),n=186)。记录患者的各项临床数据以及超声心动图指标数值,采用Pearson相关性分析及多元线性回归分析处理上述数据。结果正常体重组LAD/身高(LADI)值为(20.16±5.00)mm/m,超重组LADI值为(20.99±5.37)mm/m,肥胖组LADI值为(22.46±5.79)mm/m,3组差异有统计学意义(P<0.05),且女性高血压患者LADI显著高于男性,差异有统计学意义(P<0.05);BMI与LADI的相关性(r=0.237,P<0.05)较左心室重量指数(LVMI)高(r=0.173,P<0.05)。多元线性回归分析显示,BMI、年龄、性别与LADI独立相关(P<0.05)且BMI是影响高血压患者LADI的显著因素(男性β=0.229,P<0.001;女性β=0.159,P<0.001),随着BMI的增长,各组LADI随之增加。结论高血压患者的BMI值越高其左心房重构越明显,且男性患者较女性患者显著。

老年高血压患者血脂异常与左室射血分数及左室质量指数的相关性

目的:探讨老年高血压患者血脂异常与左室射血分数(LVEF)及左室质量指数(LVMI)的相关性。方法:选取2021年1月—2022年1月于大同市浑源县人民医院心血管内科接受治疗的老年高血压患者98例为研究对象,根据低密度脂蛋白胆固醇(LDL-C)水平分为血脂正常组(48例)、血脂边缘升高组(29例)和高脂血症组(21例)。比较三组LVEF及LVMI水平,分析老年高血压患者LDL-C水平与LVEF、LVMI水平的相关性。结果:血脂边缘升高组与血脂正常组LVEF及LVMI水平比较,差异无统计学意义(P>0.05);高脂血症组LVEF水平低于血脂正常组和血脂边缘升高组,LVMI水平高于血脂正常组和血脂边缘升高组,差异有统计学意义(P<0.05)。老年高血压患者LDL-C水平与LVEF水平呈负相关,与LVMI水平呈正相关,差异有统计学意义(r=-0.421、0.324,P<0.001)。结论:老年高血压患者LDL-C水平与LVEF呈负相关,与LVMI呈正相关,临床在关注患者血压变化的同时,也要对其血脂代谢加以重视,减少心脏重构和心血管并发症的发生,改善患者预后。