In the Heart of the Country,the second novel by J.M.Coetzee,has been traditionally read as a disembodied writing that focuses on the problem of writing per se instead of the reality.This paper contends that the work i...In the Heart of the Country,the second novel by J.M.Coetzee,has been traditionally read as a disembodied writing that focuses on the problem of writing per se instead of the reality.This paper contends that the work is actually a body narrative that explores the visceral pain suffered by Magda whose infertile body impedes her being a qualified subject.As the heroine in a postcolonial novel,Magda is not just a body that is restricted and constructed by the politics of the body,but also a thinking and writing body that consciously questions and resists the gendered bodily norms under whose yardstick her subjecthood is barred.Written in the metafictional manner,Magda’s narrative of the body is not just a record of her corporeal experience,but also a self-conscious negotiation with,and challenge of,the bodily norms under whose yardstick her body has been debased or,in terms of Judith Butler,abjected.Taking her female bodily experience as the starting point,Magda writes a feminine text that values passion,fluidity and non-linearity to disrupt the patriarchal discourse underpinned with logical reasoning.The feminine body narrative endeavors to achieve a new way of communication through which a reciprocal cross race/gender relationship might be established.展开更多
Background:Given the pervasive issues of obesity and diabetes both in Puerto Rico and the broader United States,there is a compelling need to investigate the intricate interplay among body mass index(BMI),pregesta-tio...Background:Given the pervasive issues of obesity and diabetes both in Puerto Rico and the broader United States,there is a compelling need to investigate the intricate interplay among body mass index(BMI),pregesta-tional,and gestational maternal diabetes,and their potential impact on the occurrence of congenital heart defects(CHD)during neonatal development.Methods:Using the comprehensive System of Vigilance and Surveillance of Congenital Defects in Puerto Rico,we conducted a focused analysis on neonates diagnosed with CHD between 2016 and 2020.Our assessment encompassed a range of variables,including maternal age,gestational age,BMI,pregestational diabetes,gestational diabetes,hypertension,history of abortion,and presence of preeclampsia.Results:A cohort of 673 patients was included in our study.The average maternal age was 26 years,within a range of 22 to 32 years.The mean gestational age measured 39 weeks,with a median span of 38 to 39 weeks.Of the 673 patients,274(41%)mothers gave birth to neonates diagnosed with CHD.Within this group,22 cases were linked to pre-gestational diabetes,while 202 were not;20 instances were associated with gestational diabetes,compared to 200 without;and 148 cases exhibited an overweight or obese BMI,whereas 126 displayed a normal BMI.Conclusion:We identified a statistically significant correlation between pre-gestational diabetes mellitus and the occurrence of CHD.However,our analysis did not show a statistically significant association between maternal BMI and the likelihood of CHD.These results may aid in developing effective strategies to prevent and manage CHD in neonates.展开更多
Objectives To investigate the relationship of serum leptin concentration with the lipids and body mass index (BMI) in patients with chronic congestive heart failure(CHF). Methods The serum concentration of leptin ...Objectives To investigate the relationship of serum leptin concentration with the lipids and body mass index (BMI) in patients with chronic congestive heart failure(CHF). Methods The serum concentration of leptin in 39 patients with CHF (14 in cardiac function class Ⅱ , 21 in class Ⅲ, 4 in classⅣ , NYHA) and in 46 patients with cardiac function class Ⅰ (NYHA) were assessed by radioimmunoassay. Results The serum concentration of leptin were 9.018±4.519 μg/l in CHF group (cardiac function class Ⅱ 11.492±5.649 μg/l, class Ⅲ 7.763±3.321 μg/l, class Ⅳ 6.100±2.657 μg/l); 11.674± 6.911 μg/l in class Ⅰ group. The serum concentrations of leptin were significantly lower in CHF group, as compared with class Ⅰ group (P〈 0.05). Moreover, the decrease of serum leptin concentration was significantly correlated with the decreased serum concentrations of total cholesterol, triglyceride, body mass index and left ventricular ejection fraction in CHF group, respectively (P 〈 0.05). Conclusions The significance of the decrease in serum leptin in CHF patients needs further study.展开更多
In this study we examined the relaxing effects of listening to music on a total of 12 women aged from their 20s to their 40s by measuring their blood flow, heart rate variability, and their body surface temperature. A...In this study we examined the relaxing effects of listening to music on a total of 12 women aged from their 20s to their 40s by measuring their blood flow, heart rate variability, and their body surface temperature. As a result, We found that there was a tendency for the volume of blood flow to the fingertips to significantly increase when listening to classical music, but there was a variety of changes in blood flow between each age group for healing music and J-Pop music. When measuring heart rate it was found that the LF/HF value, which is an index for the autonomic nervous system which shows tension and stress, fell significantly when listening to each type of music. Lastly, there was a trend for body surface temperature to rise when listening to classical or healing music, a rise which was particularly significant when listening to healing music. This study shows that a relaxing effect can be expected for all indices when listening to classical music. However, for healing music and J-Pop, personal musical preferences seemed to have an effect and the results were varied.展开更多
Objective:To make and study computed system for external cardiac massage,monitor of heart and body temperature and observe its clinical effect.Method:The system was made and applied.Result:The effect of system was obv...Objective:To make and study computed system for external cardiac massage,monitor of heart and body temperature and observe its clinical effect.Method:The system was made and applied.Result:The effect of system was obvious.Conclusion: The system was an effective clinical equipment in treatment of patient with cardiac arrest.展开更多
Objective To verify the optimal cut-off points for overweight and obesity in Chinese adults based on the relationship of baseline body mass index (BMI) to all-cause mortality, and incidence of cardiovascular diseases...Objective To verify the optimal cut-off points for overweight and obesity in Chinese adults based on the relationship of baseline body mass index (BMI) to all-cause mortality, and incidence of cardiovascular diseases from pooled data of Chinese cohorts. Methods The prospective study data of existing cohort studies in China were collected, and the age-adjusted all-cause mortality stratified by BMI were estimated. The similar analysis was repeated after excluding deaths within the first three years of follow-up and after excluding smokers. The incidence of age-adjusted coronary heart disease (CHD) and stroke stratified by BMI were also analyzed. Multiple Cox regression coefficients of BMI for the incidence of CHD and stroke after controlling other risk factors were pooled utilizing the methods of weighting by inverse of variance to reveal whether BMI had independent effect and its strength on the incidence of CHD and stroke. Results The data of 4 cohorts including 76 227 persons, with 745 346 person-years of follow-up were collected and analyzed. The age-adjusted all-cause mortality stratified by BMI showed a U-shaped curve, even after excluding deaths within the first three years of follow-up and excluding smokers. Age-adjusted all-cause mortality increased when BMI was lower than 18.5 and higher than 28. The incidence of CHD and stroke, especially ishemic stroke increased with increasing BMI, this was consistent with parallel increasing of risk factors. Cox regression analysis showed that BMI was an independent risk factor for both CHD and stroke. Each amount of 2 kg/m2 increase in baseline BMI might cause 15.4%, 6.1% and 18.8 % increase in relative risk of CHD, total stroke and ischemic stroke. Reduction of BMI to under 24 might prevent the incidence of CHD by 11% and that of stroke by 15 % for men, and 22 % of both diseases for women. Conclusion BMI ≤18.5, 24-27.9 and ≥28 (kg/m2) is the appropriate cut-off points for underweight, overweight and obesity in Chinese adults.展开更多
The aim of this study was to measure the motion of the body surface induced by heartbeat by using a high-precision laser sensor in order to provide a reference for other research on medical remote sensing techniques t...The aim of this study was to measure the motion of the body surface induced by heartbeat by using a high-precision laser sensor in order to provide a reference for other research on medical remote sensing techniques that are unconstrained and non-contact. Body surface motions at some points on the chest and on the dorsal region were measured for eight men with a laser displacement sensor. For comparison, an electrocardiograph was also used to monitor the heartbeat. As a result, we confirmed cyclic motion of about 0.1 mm in amplitude everywhere on the body surface, not only from the front of the body but also from the back and the neck. In contrast, which part on the body was most suitable for measurement had to be taken into account because a difference in motion amplitudes was observed in different parts on the body. The amplitude of the motions also depended on the conditions of the body surface as well as underneath the skin. These results show the possibility of acquiring information about heartbeats from anywhere on the body by using an unconscious sensing technique, and the potential for the technique to monitor the condition of the body and personal physical characteristics.展开更多
The purpose of this work is to identify in the anthropometrical indicators used here in this study the percentage of body fat, the body mass index (BMI) and the waist-hip ratio (WHR), which present a correlation with ...The purpose of this work is to identify in the anthropometrical indicators used here in this study the percentage of body fat, the body mass index (BMI) and the waist-hip ratio (WHR), which present a correlation with the metabolic variables of heart rate, blood pressure (systolic and diastolic) and double product. A population of 69 subjects averaging 41.7 ± 6.6 years old had their data registered by applying the Bruce Protocol modified to calculate metabolic variables;to obtain the percentage of fat, the formula of Petroski was used. The data collected received statistical treatment by the “Statistical 5.0” program with correlation being made by the calculation of the simple coefficient of Pearson “r” by means of a statistical significance test (p < 0.05). In the results, heart rate appeared to be correlated essentially with the intensity of force, associating itself with the percentage of fat and the BMI. Blood pressure presented a good correlation with the BMI, principally in the female group. In the male group, the anthropometrical indicator that had major associations with blood pressure was the WHR, showing an association between the pattern of male body fat distribution (android) and blood pressure. The double-product had a major correlation with the BMI;however, this variable really reflects the work of the myocardium since the BMI is the only indicator used here that includes lean mass in its values. The time spent on the treadmill was correlated in a negative way only with the percentage of fat;in other words, the greater the percentage, the lesser time spent on the treadmill.展开更多
Purpose:Patient body temperature was monitored after cardiac valve replacement,in order to explore the characteristics of body-temperature circadian rhythm and the factors influencing that rhythm.Methods:A cohort of 6...Purpose:Patient body temperature was monitored after cardiac valve replacement,in order to explore the characteristics of body-temperature circadian rhythm and the factors influencing that rhythm.Methods:A cohort of 67 patients who received cardiac valve replacement in a Fuzhou,Fujian province,China,general hospital underwent temperature measurements and analysis(by cosine curve)of their body-temperature circadian rhythm.A biological rhythm model was established through principal component analysis and evaluation of biological rhythm features.Multiple circadian parameters were included through linear regression analysis.Results:Patients’temperature after cardiac valve replacement exhibited circadian characteristics(p<0.05),among which the scores of temperature mesor,amplitude,and acrophase were respectively(37.610.08),(0.100.09),and33(e355,e119).Body-temperature rhythms were influenced by both gender and cardiopulmonary bypass time(p<0.05).Conclusion:Although some patients’circadian characteristics disappeared after cardiac valve replacement,circadian rhythms remained intact for most patients.Measures that were found to mitigate body-temperature circadian rhythm disruption included building a natural rhythm of light/darkness and decreasing cardiopulmonary bypass time.展开更多
Objective :To overall evaluate the change of global cardiac systolic performance and diastolic filling in hypovoleamia by LBNP, Methods:10 healthy male subjects were placed in a standard LBNP chamber. Baseline haemo...Objective :To overall evaluate the change of global cardiac systolic performance and diastolic filling in hypovoleamia by LBNP, Methods:10 healthy male subjects were placed in a standard LBNP chamber. Baseline haemodynamic and echocardiographic measurements were made after a period of least 10 min resting supine within the chamber. Pressure was then decreased to -10,-20 and -30 mmHg, with each pressure maintained for 15 rain. The indices of four transvalvular and SVC flow were measured using Doppler echocardiography. Results :The results showed that S wave, Re wave ,and VTI of SVC progressively decreased with increasing LBNP. At -30 mmHg stage, S wave decreased by 35.4 % (change of 0.21±0.03 m/s, P 〈 0.001). This reduction in pre-load Was associated with a progressive decrease in SV(by 21.5 ± 4.5 ml at -30 mmHg,P 〈 0.001 ), decrease in CO(by 1.2 ± 0.2 L min^-1 at -30 mmHg LBNP,P 〈 0.001 ). The diastolic filling of mitral and tricuspid flow also reduced significantly. At -30 mmHg stage, the E wave of MVF and TVF decreased 31% and 32% respectively (change of 0.23 ± 0.05 m/s,P 〈 0.001 and 0.18 ± 0.01 m/s,P 〈 0.001). VTI of MVF and TVF decreased 27% and 27.7% respectively(change of 5.55 ± 1.41cm,P 〈 0.01 and 4.25 ± 0.44 cm,P 〈 0.01). A wave of both sides did not change significantly. Conclusion:Doppler indices changes in different LBNP stage can roughly reflect the degree of hypovoleamia caused by blood volume redistribution. The indices of Doppler echocardiography are more sensitive than traditional physiological indexes in evaluating cardiovascular responses of LBNP. Echocardiography techniques overall can evaluate the global cardiac function including systolic performance and diastolic filling.展开更多
背景日常活动量减少和运动功能受限是心力衰竭患者的特征性表现之一,体位/体动信息与心衰患者疾病严重程度和预后密切相关。通过可穿戴生理监测系统量化体位/体动信息或可作为一种潜在的心衰病情严重程度定量评价手段,其与纽约心脏病协...背景日常活动量减少和运动功能受限是心力衰竭患者的特征性表现之一,体位/体动信息与心衰患者疾病严重程度和预后密切相关。通过可穿戴生理监测系统量化体位/体动信息或可作为一种潜在的心衰病情严重程度定量评价手段,其与纽约心脏病协会(New York Heart Association,NYHA)心功能分级的关系需进一步研究。目的探讨心衰患者体位/体动信息定量分析结果与NYHA分级的相关性。方法纳入2021年5月—2022年11月在四川大学华西医院心内科住院的心衰患者,通过可穿戴生理监测系统采集患者入院当天和出院前1 d各24 h的连续生理监测数据,同步收集临床数据。通过对可穿戴生理监测系统内的三轴加速传感器信息进行处理分析,计算卧床时间、活动时间、步数、睡眠翻身次数4个体位/体动指标。基于患者入院时NYHA分级、入院和出院情况、出院时NYHA分级改善与否进行分组,分析体位/体动指标与NYHA分级的关联性。结果纳入心衰患者69例,平均年龄(60.90±14.24)岁,其中男性40例,NYHAⅡ、Ⅲ、Ⅳ级的患者分别有9例、24例、36例。随着NYHA分级的升高,心衰患者全天的卧床时间占比逐渐增多,而全天的活动时间占比、平均每小时步数逐渐降低,以上3个指标在NYHAⅡ、Ⅲ、Ⅳ级间均有统计学差异(P均<0.05);其中卧床时间占比(r_(s)=0.319,P=0.008)与NYHA分级呈正相关,活动时间占比(r_(s)=-0.312,P=0.009)、平均每小时步数(r_(s)=-0.309,P=0.010)与NYHA分级存在负相关。出院时的卧床时间占比显著低于入院时(96.25%vs 97.63%,P=0.026);出院时的活动时间占比显著高于入院时(3.32%vs 1.78%,P<0.001);出院时的平均每小时步数显著高于入院时(97.17步/h vs 35.58步/h,P<0.001);其中出院时NYHA改善组患者的体位/体动指标变化趋势同上,未改善组仅出院时的平均每小时步数显著高于入院时,NYHA改善组的出入院平均每小时步数变化值显著高于未改善组(71.21步/h vs 21.31步/h,P=0.003)。结论可穿戴生理监测系统能够对心衰患者的体位/体动信息进行客观长程的监测,心衰患者的卧床时间与NYHA分级呈正相关关系;活动时间、步数与NYHA分级呈负相关关系,这些体位/体动指标或可作为心衰患者疾病严重程度分级和状态监测评估的有用指标,未来可进一步延伸到对患者的居家和长程监测。展开更多
基金supported by Humanities and Social Sciences Fund of Ministry of Education of China (No.19XJA7520012020)supported by National Social Science Fund of China (No.20BWW069).
文摘In the Heart of the Country,the second novel by J.M.Coetzee,has been traditionally read as a disembodied writing that focuses on the problem of writing per se instead of the reality.This paper contends that the work is actually a body narrative that explores the visceral pain suffered by Magda whose infertile body impedes her being a qualified subject.As the heroine in a postcolonial novel,Magda is not just a body that is restricted and constructed by the politics of the body,but also a thinking and writing body that consciously questions and resists the gendered bodily norms under whose yardstick her subjecthood is barred.Written in the metafictional manner,Magda’s narrative of the body is not just a record of her corporeal experience,but also a self-conscious negotiation with,and challenge of,the bodily norms under whose yardstick her body has been debased or,in terms of Judith Butler,abjected.Taking her female bodily experience as the starting point,Magda writes a feminine text that values passion,fluidity and non-linearity to disrupt the patriarchal discourse underpinned with logical reasoning.The feminine body narrative endeavors to achieve a new way of communication through which a reciprocal cross race/gender relationship might be established.
基金The San Juan Bautista School of Medicine’s Institutional Review Board approved the study(EMSJBIRB-7-2021).
文摘Background:Given the pervasive issues of obesity and diabetes both in Puerto Rico and the broader United States,there is a compelling need to investigate the intricate interplay among body mass index(BMI),pregesta-tional,and gestational maternal diabetes,and their potential impact on the occurrence of congenital heart defects(CHD)during neonatal development.Methods:Using the comprehensive System of Vigilance and Surveillance of Congenital Defects in Puerto Rico,we conducted a focused analysis on neonates diagnosed with CHD between 2016 and 2020.Our assessment encompassed a range of variables,including maternal age,gestational age,BMI,pregestational diabetes,gestational diabetes,hypertension,history of abortion,and presence of preeclampsia.Results:A cohort of 673 patients was included in our study.The average maternal age was 26 years,within a range of 22 to 32 years.The mean gestational age measured 39 weeks,with a median span of 38 to 39 weeks.Of the 673 patients,274(41%)mothers gave birth to neonates diagnosed with CHD.Within this group,22 cases were linked to pre-gestational diabetes,while 202 were not;20 instances were associated with gestational diabetes,compared to 200 without;and 148 cases exhibited an overweight or obese BMI,whereas 126 displayed a normal BMI.Conclusion:We identified a statistically significant correlation between pre-gestational diabetes mellitus and the occurrence of CHD.However,our analysis did not show a statistically significant association between maternal BMI and the likelihood of CHD.These results may aid in developing effective strategies to prevent and manage CHD in neonates.
文摘Objectives To investigate the relationship of serum leptin concentration with the lipids and body mass index (BMI) in patients with chronic congestive heart failure(CHF). Methods The serum concentration of leptin in 39 patients with CHF (14 in cardiac function class Ⅱ , 21 in class Ⅲ, 4 in classⅣ , NYHA) and in 46 patients with cardiac function class Ⅰ (NYHA) were assessed by radioimmunoassay. Results The serum concentration of leptin were 9.018±4.519 μg/l in CHF group (cardiac function class Ⅱ 11.492±5.649 μg/l, class Ⅲ 7.763±3.321 μg/l, class Ⅳ 6.100±2.657 μg/l); 11.674± 6.911 μg/l in class Ⅰ group. The serum concentrations of leptin were significantly lower in CHF group, as compared with class Ⅰ group (P〈 0.05). Moreover, the decrease of serum leptin concentration was significantly correlated with the decreased serum concentrations of total cholesterol, triglyceride, body mass index and left ventricular ejection fraction in CHF group, respectively (P 〈 0.05). Conclusions The significance of the decrease in serum leptin in CHF patients needs further study.
文摘In this study we examined the relaxing effects of listening to music on a total of 12 women aged from their 20s to their 40s by measuring their blood flow, heart rate variability, and their body surface temperature. As a result, We found that there was a tendency for the volume of blood flow to the fingertips to significantly increase when listening to classical music, but there was a variety of changes in blood flow between each age group for healing music and J-Pop music. When measuring heart rate it was found that the LF/HF value, which is an index for the autonomic nervous system which shows tension and stress, fell significantly when listening to each type of music. Lastly, there was a trend for body surface temperature to rise when listening to classical or healing music, a rise which was particularly significant when listening to healing music. This study shows that a relaxing effect can be expected for all indices when listening to classical music. However, for healing music and J-Pop, personal musical preferences seemed to have an effect and the results were varied.
文摘Objective:To make and study computed system for external cardiac massage,monitor of heart and body temperature and observe its clinical effect.Method:The system was made and applied.Result:The effect of system was obvious.Conclusion: The system was an effective clinical equipment in treatment of patient with cardiac arrest.
基金This project is supported by China Roche Pharmaceuticals.
文摘Objective To verify the optimal cut-off points for overweight and obesity in Chinese adults based on the relationship of baseline body mass index (BMI) to all-cause mortality, and incidence of cardiovascular diseases from pooled data of Chinese cohorts. Methods The prospective study data of existing cohort studies in China were collected, and the age-adjusted all-cause mortality stratified by BMI were estimated. The similar analysis was repeated after excluding deaths within the first three years of follow-up and after excluding smokers. The incidence of age-adjusted coronary heart disease (CHD) and stroke stratified by BMI were also analyzed. Multiple Cox regression coefficients of BMI for the incidence of CHD and stroke after controlling other risk factors were pooled utilizing the methods of weighting by inverse of variance to reveal whether BMI had independent effect and its strength on the incidence of CHD and stroke. Results The data of 4 cohorts including 76 227 persons, with 745 346 person-years of follow-up were collected and analyzed. The age-adjusted all-cause mortality stratified by BMI showed a U-shaped curve, even after excluding deaths within the first three years of follow-up and excluding smokers. Age-adjusted all-cause mortality increased when BMI was lower than 18.5 and higher than 28. The incidence of CHD and stroke, especially ishemic stroke increased with increasing BMI, this was consistent with parallel increasing of risk factors. Cox regression analysis showed that BMI was an independent risk factor for both CHD and stroke. Each amount of 2 kg/m2 increase in baseline BMI might cause 15.4%, 6.1% and 18.8 % increase in relative risk of CHD, total stroke and ischemic stroke. Reduction of BMI to under 24 might prevent the incidence of CHD by 11% and that of stroke by 15 % for men, and 22 % of both diseases for women. Conclusion BMI ≤18.5, 24-27.9 and ≥28 (kg/m2) is the appropriate cut-off points for underweight, overweight and obesity in Chinese adults.
文摘The aim of this study was to measure the motion of the body surface induced by heartbeat by using a high-precision laser sensor in order to provide a reference for other research on medical remote sensing techniques that are unconstrained and non-contact. Body surface motions at some points on the chest and on the dorsal region were measured for eight men with a laser displacement sensor. For comparison, an electrocardiograph was also used to monitor the heartbeat. As a result, we confirmed cyclic motion of about 0.1 mm in amplitude everywhere on the body surface, not only from the front of the body but also from the back and the neck. In contrast, which part on the body was most suitable for measurement had to be taken into account because a difference in motion amplitudes was observed in different parts on the body. The amplitude of the motions also depended on the conditions of the body surface as well as underneath the skin. These results show the possibility of acquiring information about heartbeats from anywhere on the body by using an unconscious sensing technique, and the potential for the technique to monitor the condition of the body and personal physical characteristics.
文摘The purpose of this work is to identify in the anthropometrical indicators used here in this study the percentage of body fat, the body mass index (BMI) and the waist-hip ratio (WHR), which present a correlation with the metabolic variables of heart rate, blood pressure (systolic and diastolic) and double product. A population of 69 subjects averaging 41.7 ± 6.6 years old had their data registered by applying the Bruce Protocol modified to calculate metabolic variables;to obtain the percentage of fat, the formula of Petroski was used. The data collected received statistical treatment by the “Statistical 5.0” program with correlation being made by the calculation of the simple coefficient of Pearson “r” by means of a statistical significance test (p < 0.05). In the results, heart rate appeared to be correlated essentially with the intensity of force, associating itself with the percentage of fat and the BMI. Blood pressure presented a good correlation with the BMI, principally in the female group. In the male group, the anthropometrical indicator that had major associations with blood pressure was the WHR, showing an association between the pattern of male body fat distribution (android) and blood pressure. The double-product had a major correlation with the BMI;however, this variable really reflects the work of the myocardium since the BMI is the only indicator used here that includes lean mass in its values. The time spent on the treadmill was correlated in a negative way only with the percentage of fat;in other words, the greater the percentage, the lesser time spent on the treadmill.
基金This study was supported by Fujian,China,Provincial funds(2011-CX-24).
文摘Purpose:Patient body temperature was monitored after cardiac valve replacement,in order to explore the characteristics of body-temperature circadian rhythm and the factors influencing that rhythm.Methods:A cohort of 67 patients who received cardiac valve replacement in a Fuzhou,Fujian province,China,general hospital underwent temperature measurements and analysis(by cosine curve)of their body-temperature circadian rhythm.A biological rhythm model was established through principal component analysis and evaluation of biological rhythm features.Multiple circadian parameters were included through linear regression analysis.Results:Patients’temperature after cardiac valve replacement exhibited circadian characteristics(p<0.05),among which the scores of temperature mesor,amplitude,and acrophase were respectively(37.610.08),(0.100.09),and33(e355,e119).Body-temperature rhythms were influenced by both gender and cardiopulmonary bypass time(p<0.05).Conclusion:Although some patients’circadian characteristics disappeared after cardiac valve replacement,circadian rhythms remained intact for most patients.Measures that were found to mitigate body-temperature circadian rhythm disruption included building a natural rhythm of light/darkness and decreasing cardiopulmonary bypass time.
文摘Objective :To overall evaluate the change of global cardiac systolic performance and diastolic filling in hypovoleamia by LBNP, Methods:10 healthy male subjects were placed in a standard LBNP chamber. Baseline haemodynamic and echocardiographic measurements were made after a period of least 10 min resting supine within the chamber. Pressure was then decreased to -10,-20 and -30 mmHg, with each pressure maintained for 15 rain. The indices of four transvalvular and SVC flow were measured using Doppler echocardiography. Results :The results showed that S wave, Re wave ,and VTI of SVC progressively decreased with increasing LBNP. At -30 mmHg stage, S wave decreased by 35.4 % (change of 0.21±0.03 m/s, P 〈 0.001). This reduction in pre-load Was associated with a progressive decrease in SV(by 21.5 ± 4.5 ml at -30 mmHg,P 〈 0.001 ), decrease in CO(by 1.2 ± 0.2 L min^-1 at -30 mmHg LBNP,P 〈 0.001 ). The diastolic filling of mitral and tricuspid flow also reduced significantly. At -30 mmHg stage, the E wave of MVF and TVF decreased 31% and 32% respectively (change of 0.23 ± 0.05 m/s,P 〈 0.001 and 0.18 ± 0.01 m/s,P 〈 0.001). VTI of MVF and TVF decreased 27% and 27.7% respectively(change of 5.55 ± 1.41cm,P 〈 0.01 and 4.25 ± 0.44 cm,P 〈 0.01). A wave of both sides did not change significantly. Conclusion:Doppler indices changes in different LBNP stage can roughly reflect the degree of hypovoleamia caused by blood volume redistribution. The indices of Doppler echocardiography are more sensitive than traditional physiological indexes in evaluating cardiovascular responses of LBNP. Echocardiography techniques overall can evaluate the global cardiac function including systolic performance and diastolic filling.
文摘目的分析体质量指数(Body mass index,BMI)与老年慢性心力衰竭(Chronic heart failure,CHF)患者血浆胱抑素C(cystatinC,Cys-C)、N末端B型利钠肽原(N-terminal pro-B-type natriuretic peptide,NT-proBNP)水平相关性,并分析血浆Cys-C、NT-proBNP评估老年CHF患者预后价值。方法选择2021年7月—2022年10月在本院接受治疗的192例老年慢性心力衰竭(CHF)患者作为研究对象,按照BMI指数分为肥胖组(49例)、超重组(68例)和正常组(75例)三组。对比各亚组患者血浆Cys-C、NT-proBNP水平差异,采用Pearson相关性分析的方式探究老年CHF患者BMI指数与血浆Cys-C、NT-proBNP相关性,对入组患者实施12个月随访,将患者按照预后情况区分为死亡组和存活组,对比两亚组患者血浆Cys-C、NT-proBNP水平差异并评估预后评估价值。结果肥胖组患者血浆Cys-C、NT-proBNP水平高于超重组,超重组患者血浆Cys-C、NT-proBNP水平高于正常组,差异具有统计学意义(P<0.05);入组老年CHF患者的BMI指数与其血浆Cys-C、NT-proBN水平均呈现明显的正相关性(r=0.7104,P<0.0001)(r=0.6603,P<0.0001);随访12个月显示,死亡组患者的血浆Cys-C、NT-proBNP水平显著高于存活组患者,差异具有统计学意义(P<0.05);血浆Cys-C、NT-proBNP对老年CHF预后评估曲线下面积(area under curv,AUC)为0.6930(P=0.0009)、0.7982(P<0.0001)。结论老年CHF患者随BMI指数升高,血浆Cys-C、NT-proBNP水平逐渐升高,血浆Cys-C、NT-proBNP对老年CHF临床结局具有一定的预测价值,进一步研究有推广应用于老年CHF预后评估潜力。
文摘背景日常活动量减少和运动功能受限是心力衰竭患者的特征性表现之一,体位/体动信息与心衰患者疾病严重程度和预后密切相关。通过可穿戴生理监测系统量化体位/体动信息或可作为一种潜在的心衰病情严重程度定量评价手段,其与纽约心脏病协会(New York Heart Association,NYHA)心功能分级的关系需进一步研究。目的探讨心衰患者体位/体动信息定量分析结果与NYHA分级的相关性。方法纳入2021年5月—2022年11月在四川大学华西医院心内科住院的心衰患者,通过可穿戴生理监测系统采集患者入院当天和出院前1 d各24 h的连续生理监测数据,同步收集临床数据。通过对可穿戴生理监测系统内的三轴加速传感器信息进行处理分析,计算卧床时间、活动时间、步数、睡眠翻身次数4个体位/体动指标。基于患者入院时NYHA分级、入院和出院情况、出院时NYHA分级改善与否进行分组,分析体位/体动指标与NYHA分级的关联性。结果纳入心衰患者69例,平均年龄(60.90±14.24)岁,其中男性40例,NYHAⅡ、Ⅲ、Ⅳ级的患者分别有9例、24例、36例。随着NYHA分级的升高,心衰患者全天的卧床时间占比逐渐增多,而全天的活动时间占比、平均每小时步数逐渐降低,以上3个指标在NYHAⅡ、Ⅲ、Ⅳ级间均有统计学差异(P均<0.05);其中卧床时间占比(r_(s)=0.319,P=0.008)与NYHA分级呈正相关,活动时间占比(r_(s)=-0.312,P=0.009)、平均每小时步数(r_(s)=-0.309,P=0.010)与NYHA分级存在负相关。出院时的卧床时间占比显著低于入院时(96.25%vs 97.63%,P=0.026);出院时的活动时间占比显著高于入院时(3.32%vs 1.78%,P<0.001);出院时的平均每小时步数显著高于入院时(97.17步/h vs 35.58步/h,P<0.001);其中出院时NYHA改善组患者的体位/体动指标变化趋势同上,未改善组仅出院时的平均每小时步数显著高于入院时,NYHA改善组的出入院平均每小时步数变化值显著高于未改善组(71.21步/h vs 21.31步/h,P=0.003)。结论可穿戴生理监测系统能够对心衰患者的体位/体动信息进行客观长程的监测,心衰患者的卧床时间与NYHA分级呈正相关关系;活动时间、步数与NYHA分级呈负相关关系,这些体位/体动指标或可作为心衰患者疾病严重程度分级和状态监测评估的有用指标,未来可进一步延伸到对患者的居家和长程监测。