Grid Search for Predicting Coronary Heart Disease by Tuning Hyper-Parameters

Diagnosing the cardiovascular disease is one of the biggest medical difficulties in recent years.Coronary cardiovascular(CHD)is a kind of heart and blood vascular disease.Predicting this sort of cardiac illness leads to more precise decisions for cardiac disorders.Implementing Grid Search Optimization(GSO)machine training models is therefore a useful way to forecast the sickness as soon as possible.The state-of-the-art work is the tuning of the hyperparameter together with the selection of the feature by utilizing the model search to minimize the false-negative rate.Three models with a cross-validation approach do the required task.Feature Selection based on the use of statistical and correlation matrices for multivariate analysis.For Random Search and Grid Search models,extensive comparison findings are produced utilizing retrieval,F1 score,and precision measurements.The models are evaluated using the metrics and kappa statistics that illustrate the three models’comparability.The study effort focuses on optimizing function selection,tweaking hyperparameters to improve model accuracy and the prediction of heart disease by examining Framingham datasets using random forestry classification.Tuning the hyperparameter in the model of grid search thus decreases the erroneous rate achieves global optimization.

Risk Assessment and Risk Perception of Coronary Heart Disease in Gaza Strip, Palastine

Aim: The aim of the present study was to estimate the prevalence of coronary heart diseases (CHD) risk factors among Ghaza (Palastine) university students, to assess the CHD risk among them using a suitable scoring system and to identify how they perceive their risk of CHD. Methods: During the period from May 2008 to May 2009, 501 students were involved. Participants were subjected to the following activities;self administered questionnaire: including socio-demographic data, medical history of chronic diseases, family history about CHD, knowledge and perception of risk factors, anthropometric measurements in addition to laboratory testing. Results: The mean age was 20.8 ± 2.07 years;54% were females. The prevalence of hypertension and DM was 3.6% and 0.4% while it was 2.6% for hypercholesterolemia. The mean levels of LDL-C (88 mg/dl vs 85.5 mg/dl) and HDL-C (52.4 mg/dl vs 42.6 mg/dl) were higher among females than among males. Smoking was more prevalent among males than among females (33.1% vs 1.7%) with a total prevalence of 19%. Overweight and obesity were more prevalent among males (30.7% vs 22.5% and 9.6% vs 5.6%). In contrast to risk perception female students tend to be more knowledgeable than males with regards to different aspects of CHD. The overall level of perceived risk was moderate. Logistic regression analysis revealed that age and sex were associated significantly by higher level of total perception (p < 0.05). Conclusion: Health education and health promotion programs should be implemented and integrated within the primary health care sectors and directed to university students before admission. Further research needed to be implemented on larger sample to test knowledge and perception of the public in regard to their risk for heart disease including school children and community so that education could be provided in a more focused manner.

Lipid Profile of Coronary Heart Disease Patients: A Prospective Observational Study

Background: Coronary heart disease (CHD) remains the major cause of mortality and morbidity in the entire world population despite therapeutic advances that control many risk factors. Lipid profile is regarded as an important factor in the development of coronary heart disease. There have been numerous studies confirming the association of hyperlipidemias with coronary heart disease in most of the Western as well as Asian countries of the world. But we have very little data on the relation between CHD and lipid profile. Aim of the Study: The aim of this study was to assess abnormal lipid levels and their association with coronary heart disease. Methods: This comparative observational study was conducted at the Department of Cardiology in M. Abdur Rahim Medical College, Dinajpur, Bangladesh from January 2019 to December 2019. Properly written consent was taken from all the participants before starting the main part of the investigation. Obeying inclusion and exclusion criteria of the study, a total of 131 participants were finalized as the study population. Among them, the Case Group was formed with 90 patients who had CHD, and with 41 healthy people, the Control Group was formed. All necessary data were collected, analyzed, and disseminated by several programs of MS-Office and SPSS version 23. Result: The study was conducted with 90 case group participants and 41 control group participants. Among the case group, 78% were male and 22% were female. Among the male case group participants, 44.29% were from 51 - 60 years of age, 35.71% were from 41 - 50 years of age and the rest 20% were above 60 years of age. On the other hand, among the female participants of Case Group, 45% were from 51 - 60 years of age, 30% from 41 - 50 years of age, and 25% were over 60 years of age. Regression analysis between the male and the female showed the P-value of 0.242. Serum cholesterol concentration and HDL concentration were significant between the Case and Control groups in all age groups and the P-value was <0.0001 in every age group. Triglyceride concentration was significant between the Case and Control groups in 41 - 50 and 51 - 60 years age groups with a P-value of <0.0001. But in the >60 years age group, we did not find any significant correlation and there the P-value was 0.478. LDL concentration between the groups showed significant correlations between the Case and Control groups in 41 - 50 and 51 - 60-years’ age groups where the P values were found, <0.0001 and 0.0002 respectively. But in the >60 years’ age group, we did not find any significant correlation and there the P- value was 0.515. Conclusion: In this study, it was found that the total cholesterol, triglycerides, HDL cholesterol, and LDL cholesterol concentrations were significantly higher in coronary heart disease (CHD) patients.

Pulse Wave Analysis in Patients with Coronary Heart Disease Based on Hilbert-Huang Transformation and Time-domain

Objective: To study the characteristics of pulse tracings in CHD, and objectively evaluate the significance of pulse signal in diagnosis and appreciation of therapeutic effect in patients with coronary heart disease(CHD), and accordingly provide with theoretic proofs for developing non-invasive technique of pulse diagnosis. Methods: By using the pulse detection system, pulse graphs in CHD patients, patients without CHD and "health" adults were collected and compared. Then characters of the pulse signal were analyzed with Hilbert-Huang transformation routine (HHT) and time-domain method respectively. Results: There existed characteristic change in pulse graph in CHD. ① h1,h3,h4,h3/h1,t,t5/t4 in time domain parameters of pulse graph increased and w1 was widened. ② 44% of C2 wave in HHT display showed chaotic and disorderly wave and irregularly wave amplitude in CHD. And 72% of C5 Wave exhibited in irregular wave with average wave amplitude over 10 gram-forces. These changes were significantly different from health adults. Conclusion: Characteristic wave of pulse graph extracted with methods of time domain or HHT routine might be considered as proofs for diagnosis and differentiation in CHD. Our researches prognosticate that pulse diagnosis can be used as an ancillary determination in occurrence of CHD for reasons of the advantage of convenient operation and non-invasion.

Coronary heart disease-related fatigue:risk factors,assessment and treatments

Coronary atherosclerotic heart disease is a disease of myocardial ischemia and hypoxia,which often presents as chest pain,dyspnea,cold sweat and fatigue.Fatigue is the subjective experience of patients,which is easy to be ignored,and will lead to the decline of patients’quality of life and physical activity level,etc.,with a high incidence and great harm.The purpose of this paper was to review the concept,risk factors,assessment tools and intervention measures of coronary atherosclerotic heart disease fatigue in order to provide a reference for identifying and improving the fatigue of coronary atherosclerotic heart disease.

A Readmission Risk Prediction Model for Elderly Patients with Coronary Heart Disease

Objective:To analyze the independent risk factors and establish a risk prediction model by investigating the readmission of elderly patients with coronary heart disease(CHD)within 1 year after discharge.Methods:A total of 480 CHD patients,who were hospitalized in the Affiliated Hospital of Hebei University from October 2019 to December 2020,were included in this study.A general data scale,mental health status scale,the Clinical Frailty Scale,Pittsburgh Sleep Quality Index,as well as the Family Adaptability and Cohesion Evaluation Scale were used to collect data.According to the number of readmissions due to CHD within 1 year after discharge,the patients were divided into two groups:the readmission group(n=212)and the no readmission group(n=268).General data,laboratory examination indicators,frailty,mental health status,sleep status,as well as family intimacy and adaptability were compared between the two groups.Logistic regression was used to analyze the independent risk factors for the readmission of these patients,and R software was used to construct a line diagram model for predicting readmission of elderly patients with CHD.Results:Five factors including body mass index(OR=1.045),low density lipoprotein(OR=1.123),frailty(OR=1.946),mental health(OR=1.099),as well as family intimacy and adaptability(OR=0.928)were included to construct the risk prediction model for the readmission of elderly patients with CHD within 1 year after discharge.The ROC curve showed that the area under the curve for predicting readmission of elderly patients with CHD was 0.816;Hosmer-Lemeshow goodness of fit test showed X2=1.456 and P=0.989;the maximum Youden index corresponding to the predicted value of risk was 0.526.The results showed that the model could accurately predict the risk of readmission in elderly patients with CHD within 1 year after discharge.Conclusion:This study constructed a line diagram model based on five independent risk factors of the readmission of elderly patients with CHD:body mass index,low density lipoprotein,frailty,mental health status,as well as family intimacy and adaptability.This model has good discrimination,accuracy,and predictive efficiency,providing reference for the early prevention and intervention of readmission in elderly patients with CHD recurrence.

Effect of Psychological Education Combined with Progressive Muscle Relaxation Training on the Symptom Cluster and Rehospitalization Rate of Elderly Patients with Coronary Heart Disease

Objective:To investigate the effect of psychological education combined with progressive muscle relaxation training on the symptom cluster and rehospitalization of elderly patients with coronary heart disease.Methods:This study is a longitudinal randomized controlled study involving 140 elderly patients with coronary heart disease.The patients were divided into two groups:an intervention group and a control group,with 70 cases in each group,via random number table.The patients in the control group received routine nursing,whereas those in the intervention group received psychological education combined with progressive muscle relaxation training for 4 weeks on the basis of routine nursing.The effect of the intervention was evaluated before intervention,at the end of 1 month,3 months,and 6 months after intervention.Results:At the end of 1 month,3 months,and 6 months,the sleep,fatigue,anxiety,and functional status of the patients in the intervention group were significantly better than those of the control group,with statistical significance difference(P<0.05).The rehospitalization rate of the intervention group was lower than that of the control group,and the difference was statistically significant(X2=10.685,P=0.001).Conclusion:Psychological education combined with progressive muscle relaxation training is effective in alleviating the symptom cluster of elderly patients with coronary heart disease and reducing their rehospitalization rate;thus,it should be popularized.

Efficacy of Danlou Tablet in the Treatment of Coronary Heart Disease with Phlegm and Blood Stasis Syndrome and Its Effects on Serum Inflammatory Factors

[Objectives] To explore the efficacy of Danlou Tablet( DLT) in the treatment of coronary heart disease( CHD) with phlegm and blood stasis syndrome and its effects on serum inflammatory factors. [Methods]One hundred and ninety-seven patients with CHD and phlegm and blood stasis syndrome in our hospital from January 2016 to January 2018 were selected and randomly divided into two groups: control group( n =98) treated with aspirin plus atorvastatin,and research group( n =99) treated with DLT and aspirin plus atorvastatin for one month. The clinical efficacy and incidence of adverse reactions were observed. Serum secretory phospholipase A2( s PLA2),lipoprotein-associated phospholipase A2( LP-PLA2),oxidized low-density lipoprotein( ox-LDL),monocyte chemoattractant protein-1( MCP-1) and World Health Organization Quality of Life( WHOQOL-100) scores were compared before and after one month of treatment. [Results] The total effective rate was93. 94% in the research group,which was higher than that in the control group( 79. 59%,P < 0. 05);the levels of serum s PLA2,LP-PLA2,ox-LDL and MCP-1 in the research group were lower than those in the control group after one month of treatment( P < 0. 05). There was no statistical significance of the difference in the total incidence of adverse reactions between the research group and the control group( P > 0. 05).After one month of treatment,WHOQOL-100 scores were higher in two groups,which were higher in the research group than that in the control group( P < 0. 05). [Conclusions]DLT can significantly reduce the level of serum inflammatory factors,improve the quality of life in patients with CHD and phlegm and blood stasis syndrome.

Combined effects of hypertension and angiotensin Ⅱ on the risk of coronary heart disease:a population-based prospective cohort study among Inner Mongolians in China

Objective To investigate the combined effects of hypertension and angiotensinⅡon the risk of coronary heart disease(CHD)on the basis of a 10-year prospective study in an Inner Mongolian population of China.Methods Based on a cross-sectional survey,a prospective cohort study was conducted from June 2003 to July 2012 among 2,530 Mongolian people.

Reducing cholesterol to prevent coronary heart disease

Coronary heart disease (CHD) remains the number one killer of men and women in the United States of America despite major advances in interventional technologies for the treatment of coronary artery disease. CHD is rapidly becoming a major cause of morbidity and mortality in developing nations as well and is now recognized as the leading cause of death worldwide.

Depression as a risk factor for coronary heart disease—How strong is the evidence?

A critical appraisal is made of the evidence that depression is a causal risk factor for coronary heart disease. PubMed and Science Citation Index were searched for relevant papers. Forty eight papers satisfying inclusion criteria and reporting an association between a measure of depression and a coronary disease outcome were compared in terms of baseline assessment, exposure and endpoint definition, covariates measured and whether changes in, or treatment of, depression was assessed during follow-up. There was considerable variation in the definition of depression and coronary heart disease and contradictory findings are reported. Conventional risk factors for coronary heart disease were not assessed consistently or adequately. Only three of the forty-eight papers gave consideration to the time course of depression during follow-up and prior to study entry. Potentially confounding variables such as anxiety, personality traits and other psychiatric disorders were not taken into consideration in the majority of papers. Treatment of depression during the follow-up period was not mentioned in any of the papers. In light of identified methodological shortcomings and the inconsistent findings reported we suggest that there is as yet no convincing evidence that depression is an independent causal risk factor for coronary heart disease.

Hyperhomoysteinemia as a risk factor for coronary heart diseases in chronic hepatitis C patients

Hepatitis C virus is one of the major health problems worldwide. It affects mainly the liver but several extrahepatic manifestations are also accounted. Chronic hepatitis C patients are at an increased risk of developing hepatic steatosis, which share many clinical features with the metabolic syndrome. Hepatic steatosis has also been associated with elevated levels of markers of inflammation such as homocysteine, identified as hyperhomocysteinemia (HHC). HHC due to Methylenetetrahydrofolate Reductase (MTHFR) gene, in particular the C677T polymorphism, was recently associated with coronary heart diseases (CHD) in chronic hepatitis C (CHC) patients. Homocysteine is an intermediate in methionine metabolism, which takes place mainly in the liver metabolism. Deficiencies of micronutrients (folate, vitamin B 6 and possibly vitamin B 12) along with mild hyperhomocysteinemia, perhaps, act synergistically with other classical risk factors to further increase the risk of CHD. Clinical data indicate that HHC is associated with an increased incidence of CHD as well as with the severity of the disease in CHC patients. In conclusion, HHC might be a potential aetiological factor of CHD in CHC patients. The aim of this review is to investigate the progression of coronary heart diseases in chronic hepatitis C patients and correlate with levels of homocysteine in concurrence to genetic defects and nutrient deficiencies. However, future studies need to clarify the mechanistic role of HHC in CHD and CHC as a useful paradigm with most interesting therapeutic implications.

Study on the relationship between Lp-PLA2, D- dimer and Galectin-3 and atherosclerotic vulnerable plaque in patients with coronary heart disease

Objective: To explore the relationship and clinical value of serum phospholipase A2 (Lp-PLA2), d-dimers, and serum galectin-3 (galectin-3) with atherosclerotic vulnerable plaques in coronary artery patients with coronary heart disease. Methods: A total of 248 patients who underwent coronary angiography (CAG) and intravascular ultrasound (IVUS) in our hospital from June 2017 to September 2018 were selected and divided into vulnerable plaque group (89), stable plaque group (89) and control group (70) according to the examination results. The serum levels of Lp-PLA2, d-dimer and galectin-3 in three groups were compared, as well as their correlation with the detection parameters. To evaluate the clinical value of Lp-PLA2, d-dimer and galectin-3 in patients with coronary heart disease (CHD) with atherosclerotic vulnerable plaque. Results: Serum Lp-PLA2, d-dimer and galectin-3 levels were significantly different from the three groups (P<0.05), and the control group < stable plaque group <vulnerable plaque group (P<0.05). Correlation analysis showed that Lp-PLA2, d-dimer and galectin-3 were significantly positively correlated with plaque area, plaque load, necrotic core and calcified tissue (P<0.01), and negatively correlated with fibrous lipid and fibrous tissue (P<0.01). ROC curve showed that Lp-PLA2, d-dimer and galectin-3 had certain predictive value for vulnerable coronary atherosclerotic plaques (AUC=0.939, 0.977, 0.920, P<0.01), and the three combinations (AUC=0.986, P<0.01) had higher predictive value. Conclusion: Serum Lp-PLA2, d-dimer and galectin-3 are significantly correlated with coronary atherosclerotic vulnerable plaques in patients with coronary heart disease, with high sensitivity and specificity, which can be used for the diagnosis and treatment of early atherosclerotic vulnerable plaques.

Clinical perspective on C-reactive protein in prognostication of major adverse cardiac events in the elderly with established coronary heart disease

The systemic response to tissue injury, regardless of cause is characterized by a cytokine-mediated alteration in the hepatic synthesis of a number of different plasma proteins,known collectively as 'acute phase reactants'. These proteins include C-reactive protein, serum amyloid A protein, alphal glycoprotein, ceruloplasmin, alpha macroglobulins, complement components (C1-C4, factor B, C9, C11), alpha1antitrypsin, alpha1 antichymotrypsin, fibrinogen, prothrombin,factor Ⅷ, plasminogen, haptoglobin, ferritin, immunoglobulins and lipoproteins. The initiation of the acute phase response is linked to the production of hormone-like polypeptide mediators now called cytokines, namedly, interleukin 1(IL-1),tumor necrosis factor, interferon gamma, interleukin 6 (IL-6),leukemia inhibitory factor, ciliary neurotropic factor, oncostatin M, and interleukin 11 (IL- 11).……

Research progress on the correlation between TCM syndromes of coronary heart disease and blood biochemical indexes

The researches on the correlation between TCM syndromes of coronary heart disease and blood biochemical indexes from Jan.2011 to Jul.2020 were reviewed,in order to explore the association of different TCM syndromes of coronary heart disease with blood biochemical indexes,such as blood lipid metabolism,inflammatory factors,coagulation-fibrinolysis system,blood rheology and vascular endothelial function,which was hoped to provide a guidance on the clinical combined application of TCM syndrome differentiation and biochemical indexes of coronary heart disease,so as to promote the objectification and standardization of TCM syndrome differentiation.

Change and significance of fibrinolysis in coronary heart disease patients with angina pactoris

Objectives To study change and the clinical significance of fibrinolysis in coronary heart disease(CHD) patients with angina pactoris(AP).Methods Levels of plas-min plasminogen activator inhibitor-1(PAI-1),tissue-type plasminogen activator(t-PA),fibrinogen(FIB) in 110 CHD patients with AP and 20 normal cases as control group were analyzed in the same ways.Results Levels of PAI-1,FIB in CHD patients with AP were significantly higher than those in control cases,and those of t-PA were significantly lower than control cases;Levels of PAI-1,FIB in UA patients with UA heart events were significantly higher than those in patients with SA,and those of t-PA were significantly lower than patients with SA;Levels of PAI-1,FIB in patients with AP events were significantly higher than those in patients without AP events,and those of t-PA were significantly lower than patients without AP events.Conclusions There was abnormal of fibrinolysis function in CHD patients with AP, specially in patients with UA or with AP events,the abnormal of fibrinolysis might be play an important rule in coronary heart disease(CHD) patients with angina pactoris.

Systematic Evaluation and Meta-analysis on the Efficacy and Safety of Qidongyixin Oral Liquid(芪冬颐心口服液)in the Treatment of Coronary Heart Disease

Objective:To systematically evaluate the efficacy and safety of Qidongyixin Oral Liquid(芪冬颐心口服液)in the treatment of coronary heart disease.Methods:Randomized controlled trials(RCTs)on the treatment of coronary heart disease(CHD)with Qidongyixin Oral Liquid(芪冬颐心口服液)were screened out by systematically searching in CNKI,Wanfang Data,VIP,Sinomed,Cochrane Library,PubMed,Embase,Web of Science,Clinical-Trials.gov.Meta-analysis of the final included studies was performed according to RevMan 5.3 software.Results:A total of 9 studies were included,with a total sample size of 1224 cases,including 612 in the experimental group and 612 in the control group.Metaanalysis results showed that:Conventional treatment,combined with Qidongyixin Oral Liquid(芪冬颐心口服液)on the treatment of CHD had a significant efficiency,which was better than conventional treatment only(RR=1.18,95%CI[1.07-1.29],P=0.0005),and could better improve patients’electrocardiogram(RR=1.21,95%CI[1.08,1.35],P=0.001),increase left ventricle ejection fraction(MD=3.84,95%CI[3.34,4.33],P<0.00001),and reduce left ventricular end-diastolic diameter(MD=-2.81,95%CI[-3.84,-2.41],P<0.00001)and left ventricular end-systolic diameter(MD=-2.43,95%CI[-3.42,-1.43],P<0.00001).Conclusion:Qidongyixin Oral Liquid(芪冬颐心口服液)can improve the effective rate of the treatment of coronary heart disease,better improve patients’electrocardiogram,reduce the left ventricular end-diastolic and end-systolic diameter,and reduce the onset time of angina pectoris.However,the quality of the cases included in the study is relatively small,and the level of evidence is low.Therefore,RCT with large samples and rigorous design is still needed to prove the reliability of the results.

二级预防概念下的预防管理对冠心病PCI术后患者心脏康复及抗血小板效果的影响研究

目的:探究二级预防概念下的预防管理对冠心病经皮冠状动脉治疗(PCI)术后患者心脏康复及抗血小板效果的影响。方法:选择2021年2月—2022年1月河南省胸科医院收治的160例冠心病PCI患者作为研究对象,采用随机数表法分为对照组和试验组,每组各80例。对照组患者采用常规护理,试验组患者在对照组的基础上采用联合二级预防概念下的预防管理,比较两组患者干预前、干预4个月后心脏康复和抗血小板效果情况。结果:干预4个月后,试验组患者左心室射血分数(LVEF)水平高于对照组患者,左心室舒张末期内径(LVEDD)水平、美国纽约心脏病学会(NYHA)分级均低于对照组患者,差异有统计学意义(t=8.583、8.695、6.455,P<0.05)。干预4个月后,试验组患者血小板最大聚焦率(MPAR)、血将P2Y12反应单位(PRU)水平均低于对照组患者,差异有统计学意义(t=8.573、8.661,P<0.05)。结论:基于二级预防理念对冠心病PCI术后患者进行预防管理,可有效提高患者抗血小板效果,改善其心脏康复水平。

经皮冠状动脉介入治疗(PCI)患者的中医证型分布及预后危险因素:系统评价和meta分析

目的探讨经皮冠状动脉介入治疗(PCI)中医证候分布及相关风险因素,并评估现有研究的报告质量,以期为未来的标准化研究提供指导。方法分别在Pub Med、Cochrane Library和Web of Science等英文数据库,以及中国知网(CNKI)、维普(VIP)和万方数据库等中文数据库中检索PCI相关论文。论文检索的时间跨度从数据库建立至2023年10月1日。使用Stata 12和Python(V 3.9)进行统计分析。采用观察性研究报告规范(STROBE)声明评估纳入研究的报告质量。结果共筛选出1356篇文章,纳入40项横断面研究,涉及10270名参与者。PCI前最常见的中医证候为气滞血瘀证(n=261,36.45%),PCI后1–2周最常见的中医证候为痰瘀互结证(n=109,27.18%),PCI后6个月至1年最常见的中医证候为气虚血瘀证(n=645,37.03%)。吸烟[比值比(OR)=1.15,95%置信区间(CI)(0.83–1.47),I^(2)=24.7%,P=0.257]、寒凝气滞证[OR=4.62,95%CI(1.37–7.86),I^(2)=61.6%,P=0.074]及低密度脂蛋白(LDL)升高[OR=1.38,95%CI(0.92–1.85),I^(2)=12.2%,P=0.286]是再狭窄的风险因素。高血压[OR=7.26,95%CI(3.54–14.88),I^(2)=91.6%,P=0.001]和超重[即身体质量指数(BMI)>23][OR=1.20,95%CI(1.07–1.35),I^(2)=85.3%,P=0.009]是伴发焦虑的显著风险因素。结论本系统评价和meta分析显示,不同中医证型患者PCI术后特点和危险因素不同,未来需要更多相对高质量的研究,以提供更多的支持性证据。

冠心病患者体成分与心肺适能的相关性

目的·探究冠心病患者体成分与心肺适能(cardiopulmonary fitness,CRF)的相关性。方法·选取2022年10月至2023年6月于上海交通大学医学院附属仁济医院行择期经皮冠状动脉介入治疗的冠心病患者(冠心病组)以及健康体检者(健康对照组)。所有受试者均在同一日接受心肺运动试验(cardiopulmonary exercise testing,CPET)测定CRF,以及生物电阻抗分析(bioelectrical impedance analysis,BIA)测定身体成分。结果·共纳入冠心病患者191例、健康体检者188例。2组基线特征差异均无统计学意义。与健康对照组相比,冠心病患者CRF指标均显著降低(均P<0.05);在体成分指标中,冠心病组躯干肌肉质量(trunk muscle mass,TMM)显著低于健康对照组(P<0.01),躯干脂肪质量(trunk fat mass,TFM)显著高于健康对照组(P<0.01)。相关性分析显示,冠心病组TMM(R=0.538)、下肢肌肉质量(lower limbs muscle mass,LMM)(R=0.754)、下肢脂肪质量(lower limbs fat mass,LFM)(R=0.593)与每千克体质量峰值摄氧量(VO_(2peak)/kg)呈正相关(均P<0.01),TFM(R=−0.563)与VO_(2peak)/kg呈负相关(P<0.01)。其余体成分指标与VO_(2peak)/kg之间相关性均无统计学意义。依据VO_(2peak)/kg将冠心病患者分为低CRF组、中CRF组和高CRF组,结果发现3组患者LMM、TMM、LFM、TFM之间差异均存在统计学意义(均P<0.05)。多元线性回归分析提示年龄、性别、TMM、TFM、LMM、LFM均是冠心病患者VO_(2peak)/kg的相关因素。冠心病患者的VO_(2peak)/kg随着TMM、LMM、LFM的升高而升高,随着年龄和TFM的升高而下降,女性相比于男性患者VO_(2peak)/kg更低。结论·冠心病患者的CRF显著低于健康人群,TFM更高,TMM更低;在冠心病患者中,CRF与TFM呈负相关,与TMM、LMM以及LFM呈正相关。