Work-rate affects cardiopulmonary exercise test results in heart failure

AIMS: Cardiopulmonary exercise test (CPET) is used to evaluate patients with chronic heart failure (HF) usually by means of a personalized ramp exercise protocol. Our aim was to evaluate if exercise duration or ramp rate influences the results. METHODS AND RESULTS: Ninety HF patients were studied (peak V (O(2)): >20 ml/min/kg, n=28, 15-20 ml/min/kg, n=39 and <15 ml/min/kg, n=23). Each patient did four CPET studies. The initial study was used to separate the subjects into three groups, according to their exercise capacity. In the remaining studies, work-rate was increased at three different rates designed to have the subjects reach peak exercise in 5, 10 and 15 min from the start of the ramp increase in work-rate, respectively. The order was randomized. The work-rate applied for the total population averaged 22.7+/-8.0, 11.6+/-3.7, 7.5+/-2.9 W/min with effective loaded exercise duration of 5 min and 16 s+/-29 s, 9 min and 43 s+/-49 s and 14 min and 32 s+/-1 min and 12 s for the 5-, 10- and 15-min tests, respectively. Peak V (O(2)) averaged 16.9+/-4.3*, 18.0+/-4.4 and 18.0+/-5.4 ml/min/kg for the 5-, 10- and 15-min tests, (*=p<0.001 vs. 10 min). The shortest test had the lowest peak heart rate and ventilation and highest peak work-rate. Peak V (O(2)) and heart rate were lowest in 5-min tests regardless of HF severity. The DeltaV (O(2))/Deltawork-rate was lowest in 5-min tests and highest in 15-min tests. At all ramp rates, DeltaV (O(2))/Deltawork-rate was lower for the subjects with the lower peak V (O(2)). The V (e)/V (CO(2)) slope and V (O(2)) at anaerobic threshold were not affected by the protocol for any grade of HF. CONCLUSIONS: In chronic HF, exercise protocol has a small effect on peak V (O(2)) and DeltaV (O(2))/Deltawork but does not affect V (O(2)) at anaerobic threshold and V (e)/V (CO(2)) slope.     

Tissue Doppler imaging adds incremental value in predicting exercise capacity in patients with congestive heart failure

Left ventricular (LV) systolic and diastolic parameters derived from Doppler echocardiography have been used widely to predict functional capacity but diastolic filling is affected by various factors. Tissue Doppler imaging (TDI) that records systolic and diastolic velocities within the myocardium and at the corners of the mitral annulus, has been shown to provide additional information about regional and global LV function. The goal of this study was to examine whether TDI-derived parameters add incremental value to other standard Doppler echocardiographic measurements in predicting exercise capacity. The study enrolled 59 consecutive patients with stable congestive heart failure (CHF). The etiology of heart failure was coronary artery disease in 42 patients and dilated cardiomyopathy in 17. Twenty-three age-matched healthy subjects were recruited as controls. Conventional echocardiographs and TDI were obtained. Early (Ea) and late (Aa) diastolic and systolic (Sa) mitral annulus velocities, the Ea/Aa and E/Ea ratios, were measured by pulsed wave TDI placed at the septal side of the mitral annulus and results were compared with results of cardiopulmonary exercise testing. Systolic and early diastolic velocities of mitral annulus were decreased and the E/Ea ratio was increased in the restrictive group as compared to controls (P = 0.02, P = 0.03, P < 0.001, respectively) but there was no significant difference in late diastolic velocity and the Ea/Aa ratio between the restrictive group and controls. The average peak VO₂ of the patients were 14.9 ± 4.9 ml/min per kg. Achieved peak VO₂ of the patients with E/Ea ratio ≤7.5 was 17.4 ± 5 vs 12.2 ± 3 ml/min per kg for those with E/Ea >7.5 (P < 0.001). Interestingly, the patients with the nonrestrictive pattern and E/Ea ratio >7.5 had reduced exercise capacity, as did the group with restrictive LV filling patterns (12.8 ± 3.3 vs 12.9 ± 4.0 ml/min per kg, P = 0.9). Similarly, there was no significant difference in the mean exercise capacity between the patients with a nonrestrictive pattern vs restrictive pattern with E/Ea ratio ≤7.5 (16.1 ± 5.0 vs 15.4 ± 5.1 ml/min per kg, P = 0.78). Univariate analysis demonstrated that the peak Sa (r = 0.30, P = 0.03), peak Ea (r = 0.38, P = 0.004) and peak Aa (r = 0.35, P = 0.009) correlated significantly with maximum exercise capacity. No relationship was observed between the Ea/Aa ratio and peak VO₂ (r = −0.09, P = 0.48). By multivariate analysis, including age and heart rate, the E/Ea ratio was found to be an independent prognostic factor at peak VO₂ (P < 0.001. In contrast, the comparison of the maximum transmitral early diastolic velocity and the mitral annulus TDI velocity, that is E/Ea ratio, had strong correlation with peak VO₂ (r = −0.46, P < 0.001). Receiver operating characteristic (ROC) analysis was performed for prediction of limited exercise capacity from the E/Ea ratio. An E/Ea ratio ≤7.5 was able to predict peak VO₂ ≤14 ml/min per kg with a sensitivity of 84% and a specificity of 74%. If restrictive pattern or an E/Ea ratio >7.5 was used, 21 out of 24 patients in the reduced exercise capacity group were identified with 16 false positives in the preserved exercise capacity group (P = 0.001). Mitral annular systolic and diastolic velocities of TDI were associated with cardiopulmonary exercise capacity in patients with LV systolic dysfunction. Index of the E/Ea ratio was found to be the most powerful predictor of peak oxygen uptake.     

The ability of a submaximal exercise test to predict maximal exercise capacity in patients with heart failure

We investigated the ability of a submaximal exercise test topredict the maximal aerobic potential and hence exercise capacityof patients with chronic heart failure. Heart rate, oxygen consumptionand carbon dioxide production were measured continuously duringtreadmill exercise in 29 patients with chronic heart failure(NYHA Class II-III). The anaerobic threshold was determinedas the oxygen consumption at which carbon dioxide productionincreased non-linearly relative to oxygen consumption.Maximaloxygen consumption could not be predicted from the heart rateresponse to submaximal exercise.Oxygen consumption at the anaerobicthreshold (28 patients) and at a respiratory quotient of 1 (23patients) did predict maximal oxygen consumption (r = 0.93,r = 0.88, respectively). Measurement of oxygen consumption duringsubmaximal exercise can be used to assess maximal exercise capacityin patients with heart failure.     

Effect of flosequinan on exercise capacity and cardiac function in patients with chronic mild heart failure: A double-blind placebo-controlled study

Summary Although beneficial effects of a new vasodilating agent, flosequinan, have been demonstrated in patients with severe heart failure, its efficacy has not been studied in patients with a less severe form of chronic heart failure. In this study, the effects of 4 weeks' administration of flosequinan, 50mg daily, and placebo on exercise capacity, cardiac function, and symptoms of heart failure were investigated in 24 patients with chronic mild heart failure (New York Heart Association functional class, mainly class II) in a double-blind clinical trial. When the parameter changes during the treatment period of the flosequinan and placebo groups were compared, no significant difference was found in any of the measurements except for left ventricular fractional shortening determined from M-mode echocardiograms; it was increased by 2.9 ± 1.3% in the flosequinan group whereas it was decreased by 1.3 ± 0.9% in the placebo group (P < 0.05 vs flosequinan treatment). However, when compared to baseline values, flosequinan significantly increased exercise time in the symptom-limited maximal exercise test (704 ± 103 to 763 ± 107 s,P < 0.05) and the oxygen uptake at the anaerobic threshold (13.8 ± 1.3 to 16.7 ± 1.4ml/min kg,P < 0.05), and improved symptoms assessed with a new heart failure severity classification (a median value of 2.0–1.5,P < 0.05). These improvements were not observed in the placebo group. Serious adverse effects were not observed in either group. These results suggest that flosequinan is useful for the treatment of chronic mild heart failure as well as severe heart failure.Authors for the Osaka Flosequinan Multicenter Trial Group, members of which are listed in the Appendix     

Incremental shuttle and six-minute walking tests in the assessment of functional capacity in chronic heart failure

BACKGROUND

The incremental shuttle test presents some theoretical advantages over the six-minute walk test in chronic heart failure (CHF), including better standardization and less dependency on collaboration.

OBJECTIVES

The present study evaluated test-retest repeatability, test accuracy in predicting a peak oxygen consumption (VO₂) of 14 mL/kg/min or less, as well as the prognostic value of both walking tests in stable CHF patients.

METHODS

Sixty-three patients (44 men; New York Heart Association functional class II to IV) underwent an incremental treadmill exercise test and, on another day, the walk test in duplicate.

RESULTS

Patients showed well-preserved functional capacity according to the distance walked in both tests (six-minute walk test 491±94 m versus incremental shuttle walk test 422±119 m; P<0.001). Interestingly, the six-minute and incremental shuttle walk test differences in distance walked were higher in more disabled patients. The mean bias ±95% CI of the within-test differences were similar (7±40 m and 8±45 m, respectively). Peak VO₂, but not distance walked in either test, was associated with survival (P<0.05).

CONCLUSIONS

The incremental shuttle walk test showed similar repeatability and accuracy in estimating peak VO₂ compared with the six-minute walk test in CHF patients. Direct measurement of peak VO₂, however, remains superior to either walking test in predicting survival – at least in patients with well-preserved functional capacity.     

Prognostic value of cardiopulmonary exercise testing in children with heart failure secondary to idiopathic dilated cardiomyopathy in a non-beta-blocker therapy setting

BACKGROUND: Peak oxygen consumption and resting left ventricular ejection fraction (LVEF) are independent predictors of survival in adult heart failure (HF) patients. Aim: To evaluate these factors in children. METHODS: We prospectively studied 31 children with NYHA class I to III HF (mean LVEF 26+/-10%; mean age 8.6+/-1.9 years). All had dilated cardiomyopathy and were awaiting heart transplantation. A cardiopulmonary treadmill exercise test was performed and LVEF determined by radionuclide ventriculography. RESULTS: During a median follow-up of 1282 days, 20 children reached at least one end-point (death or heart transplantation). Clinical data from the 11 children without events and the 20 children with events are as follows: NYHA class 1+/-0 vs. 2+/-0.9 (p<0.01); SBP 118+/-17 vs. 102+/-16 (p=0.01); DBP 70+/-10 vs. 61+/-10 (p=0.02); heart rate 165+/-22 vs. 148+/-22 (NS); double-product 19+/-4 vs. 15+/-4 (p=0.01); end-tidal carbon dioxide tension (PetCO2) 35+/-5 vs. 30+/-6 (NS); oxygen consumption (VO2) 22+/-5.4 vs. 18.3+/-5.7 (NS); exercise time 19+/-4 vs. 13+/-6 (p<0.003), and LVEF 31+/-8 vs. 22+/-10 (p=0.02). These variables all correlated with prognosis on univariate analysis. In multivariate analysis, only decreasing exercise time and LVEF were predictive of events during follow-up (p<0.001 and 0.04). CONCLUSION: These findings suggest that reduction in LVEF and exercise tolerance in children with heart failure is predictive of functional status.     

运动疗法在冠心病慢性心力衰竭患者中的运用价值研究

目的:探讨运动康复训练对冠心病慢性心力衰竭患者心功能的影响。方法:选择100例冠心病慢性心力衰竭患者为研究对象,随机分为常规治疗组和运动疗法组(在常规治疗基础上增加运动康复训练),各50例,治疗8周后,比较两组患者的心功能、临床疗效及运动能力等指标。结果:治疗8周后,与常规治疗组比较,运动疗法组左室舒张末期内径(LVEDd)[(51.03±5.02)mm比(48.45±6.83)mm]显著缩小、左室射血分数(LVEF)[(45.93±6.55)%比(51.11±7.47)%]、左室短轴缩短率(LVFS)[(28.06±6.35)%比(31.77±7.09)%]显著提高,血浆N末端脑钠肽前体(NT-proBNP)[(1207.62±336.84)ng/L比(785.77±341.44)ng/L]、白介素(IL)-10[(3.78±1.58)ng/L比(2.76±1.03)ng/L]及转化生长因子(TGF)-β1[(266.44±40.25)ng/L比(195.63±35.90)ng/L]水平均显著降低,6min步行距离显著[(240.44±72.80)m比(325.12±80.25)m]增加,心功能改善总有效率(80.00%比94.00%)显著提高,P<0.05或<0.01。结论:运动康复训练能够显著改善冠心病慢性心力衰竭患者的心功能,提高运动能力。     

Home-based exercise training modulates pro-oxidant substrates in patients with chronic heart failure

BACKGROUND: In chronic heart failure, oxidative stress is thought to lead to endothelial dysfunction. In this study, we assessed the effect of home-based exercise training on variables of the NO and purine pathways. METHODS AND RESULTS: Eighteen patients and nine controls were randomly assigned in cross-over design to 8 weeks of exercise training (5 days/week, submaximal bicycle ergometer training, 30 min/day; calisthenics 9 min/day) and 8 weeks of sedentary lifestyle. Hypoxanthine, xanthine, l-arginine, asymmetric dimethylarginine (ADMA), symmetric DMA (SDMA) and nitrite were measured. In patients, exercise training led to an increase in peak VO(2) (p<0.003). At baseline hypoxanthine-a pro-oxidant substrate and marker of hypoxia-was higher in patients than in controls (24.6+/-4.3 vs. 11.9+/-4.2 micromol/l; p<0.05). After training there was a reduction in hypoxanthine (p<0.01). Nitrite levels were lower in patients (416+/-31 micromol/l) than in healthy controls (583+/-35 micromol/l, p<0.001). Although nitrite levels were highest after exercise, the changes did not reach statistical significance (p=n.s.). l-Arginine, ADMA, and SDMA levels were not different between groups and were not altered by exercise training. CONCLUSIONS: Chronic heart failure is associated with increased levels of hypoxanthine and decreased levels of nitrite. This imbalance can be beneficially modulated by chronic home-based exercise training.     

慢性心力衰竭患者体重指数与运动耐量的相关性研究

  目的 探讨慢性收缩性心力衰竭（心衰）患者BMI与运动耐量的关系。方法 收集慢性收缩性心衰患者,计算BMI,心肺运动试验测定运动峰耗氧量（PVO₂）,公斤体重耗氧量（PKVO₂）,每搏耗氧量（VO₂/HR）和每分通气量/每分CO₂产生量（VE/VCO₂）。结果 273例慢性收缩性心衰患者中,消瘦者（BMI＜18.5 kg/m²）6例,体重正常者（BMI 18.5~<24.0 kg/m²）113例,超重者（BMI 24.0~<28.0 kg/m²）116例,肥胖者（BMI≥28 kg/m²）38例。肥胖组和超重组患者PVO₂显著高于消瘦组和正常体重组患者［（1077.2±30.9）、（1095.3±54.3）ml/min比（550.2±192.1）、（886.0±31.2）ml/min］,而PKVO₂和VE/VCO₂显著低于消瘦组和正常体重组［（14.6±2.2）、（16.5±0.5）ml·min^-1 ·kg^-1比（14.4±0.5）、（11.6±0.9）ml·min^-1·kg^-1 ,43.4±6.1、42.3±1.5比42.3±1.5、38.6±1.6,P<0.05］。在不同心功能状态下,单相关分析显示,BMI和PVO₂呈正相关（r=0.40, P<0.01）,与PKVO₂和VE/VCO₂分别呈负相关（r=-0.15、-0.25,P值均<0.01）。多元逐步回归分析显示,年龄、性别、BMI和LVEF是PKVO₂的独立影响因素,而年龄和BMI是VE/VCO₂的独立影响因素（P<0.05）。结论 慢性收缩性心衰患者BMI与运动耐量显著相关,且是运动耐量的独立危险因素。     

老年慢性心衰患者运动康复的效果

目的：探讨老年慢性心衰患者实施运动康复的安全性及效果。方法：83例老年慢性心衰患者被随机分为常规护理组（41例,常规护理）和运动康复组（42例,在常规护理基础上接受运动训练）。疗程均为8周,随访12个月。患者心功能以纽约心脏病协会（NYHA）分级表示,以超声心动图测定左室射血分数（LVEF）和左室舒张末期内径（LVEDd）,同时测定6min步行距离（6MWD）,血浆脑钠肽（BNP）水平,代谢当量（METs）,明尼苏达心力衰竭生活质量量表（MLHFQ）评分表示健康相关生活质量,记录12个月内的再入院率和死亡率。结果：两组治疗8周时LVEF、LVEDd、NYHA分级均显著改善（P均〈0．05）,且与常规护理组相比,运动康复组LVEF[（54．7±6．2）％比（65．4±8．7）％]、LVEDd[（49．6±8．3）mm比（40．2±9．3）mm]、NYHA分级[（2．7±0．8）级比（1．9±0．9）级]改善更显著（P〈0．05）;6MWD[（122．7±9．2）m比（175．6±8．7）m]和METs[（5．8±1．8）比（8．4±2．4）]也明显增加（P〈0．01）,血浆BNP水平[（43．4±9．8）pg／ml比（31．7±8．9）pg／ml]明显降低（P〈0．05）;运动康复组康复训练中未发生严重不良事件。12个月时,运动康复组MLH-FQ评分明显高于常规护理组[（68．9±7．9）分比（45．65=8．2）分,P〈0．053,因心衰再入院率明显低于常规护理组（9．5％比24．4％,P〈0．05）。结论：对老年慢性心衰患者实施运动康复安全有效,可明显改善心功能,增强运动耐力,提高生活质量。     

Ventilatory capacity and exercise tolerance in patients with chronic stable heart failure

BACKGROUND: Patients with chronic heart failure complain of breathlessness. This is associated with an increase in the ventilatory response to carbon dioxide production (VE/VCO(2) slope), yet a reduction in the maximal ventilation achieved at peak exercise. We analysed ventilatory capacity in heart failure in relation to exercise capacity. METHODS: We analysed data from 74 patients with chronic stable heart failure [age (S.D.) 50.6 (8.8) years; left ventricular ejection fraction 30 (15)%] and 36 controls [48.9 (11.5) years]. Subjects undertook maximal incremental exercise testing with metabolic gas exchange measurements to derive peak oxygen consumption (VO(2)), the VE/VCO(2) slope and ventilation. Spirometry was used to measure FEV(1) and FVC. Maximal voluntary ventilation (MVV) was calculated as FEV(1)x 35. RESULTS: Peak VO(2) was lower in patients [20.9 (7.5) ml min(-1) kg(-1) vs. 34.5 (10.1); P<0.001] and VE/VCO(2) greater [33.4 (10.7) vs. 26.0 (4.7); P<0.001]. Ventilation at peak exercise was lower in patients [63.5 (20.4) l/min vs. 86.9 (29.5); P<0.001], as was MVV [110.1 (37.9) l/min vs. 136.2 (53.1); P<0.001], but ventilation at peak as a proportion of MVV was the same in patients [60.0 (19.0)%] as controls [65.7 (12.4)%)]. There was an inverse relation between peak VO(2) and VE/VCO(2) slope (r=-0. 62; P<0.001). Percentage predicted FEV(1) correlated with ventilation at peak (r=0.62; P<0.001) and inversely with VE/VCO(2) slope (r=-0.32; P<0.001). There was no relation between percentage of MVV achieved and peak VO(2), or VE/VCO(2) slope. CONCLUSIONS: Although ventilation at peak exercise is lower in patients with heart failure than normal subjects, ventilation is the same proportion of maximal voluntary ventilation. These findings suggest that ventilatory capacity does not limit exercise capacity in heart failure.     

终末期慢性心力衰竭患者运动中摄氧通气效率指标的临床应用

目的 评估心肺运动试验(CPET)摄氧通气效率指标摄氧效率平台(OUEP)、摄氧效率斜率(OUES)、通气量((V) E)/二氧化碳排出量((V)CO2)最低值和(V)E/(V)CO2斜率在监测终末期慢性心力衰竭(CHF)患者心功能和血液动力学状态中的意义.方法 入选2012年10月至2013年9月阜外心血管病医院住院行心脏移植的CHF患者26例.收集临床资料和CPET参数.在行CPET的2周内,进行超声心动图和Swan-Ganz导管检查监测血液动力学参数,并对CPET中摄氧通气效率指标与超声心动图参数和血液动力学参数进行相关性分析.结果 CPET摄氧效率指标OUEP、OUES与传统指标峰值氧耗量(峰值(V)O2)之间相关性好(r=0.535、P＜0.01;r=0.840、P＜0.001).在终末期CHF患者中OUEP相对峰值(V)O2的变化斜率约为32,而OUES相对峰值(V)O2的变化斜率仅约为2,两者相差约16倍,OUEP改变比OUES、峰值(V)O2更加敏感和显著(P＜0.05).OUEP、峰值(V)O2测定值占预测值百分比(％ pred)、(V)E/(V)CO2斜率和(V)E/(V)CO2最低值与无创血液动力学参数峰值心输出量(r =0.535,P＜0.01; r=0.652,P＜0.001; r=-0.640,P＜0.001; r=-0.606,P=0.001)和峰值心脏指数(r=0.556,P＜0.01;r=0.772,P＜0.001; r=-0.641,P＜0.001;r=-0.620,P＜0.001)均显著相关,但与静息状态下有创血液动力学参数心输出量和心脏指数不相关(P＞0.05).峰值(V)O2(％pred)和(V)E/(V)CO2斜率与肺动脉收缩压(r=-0.424,P＜0.05; r=0.509,P＜0.01)和平均肺动脉压力(r=-0.479,P＜0.05;r=0.405,P＜0.05)均显著相关,峰值(V)O2(％pred)还与肺毛细血管楔压显著相关(r=-0.415,P＜0.05),(V)E/(V)CO2斜率与肺血管阻力亦呈显著相关(r=0.429,P＜0.05).结论 CPET摄氧通气效率指标OUEP,可配合传统指标峰值(V)O2、(V)E/(V)CO2最低值、(V)E/(V)CO2斜率等,对CHF患者心功能和血液动力学状态的变化进行更好地监测和评估,以指导终末期CHF患者的临床管理.     

步行运动训练对慢性充血性心力衰竭患者心脏的康复

目的:观察在药物治疗基础上步行运动训练对慢性心力衰竭(CHF)患者心功能康复的效果,探寻合理的运动方式。方法:621例Ⅱ～Ⅲ级慢性心功能不全的患者在药物治疗基础上随机分为3组:A组(212例):按设定的运动处方进行康复训练;B组(203例):鼓励患者多做运动,但无运动处方;C组(206例):不改变原有生活方式,不限制日常活动。经过6个月的随访,对比各组的血压、静息心率、6min步行距离、心脏超声检查的左室射血分数(LVEF)和左室舒末内径(LVEDd)等的变化。结果:运动训练前3组间一般情况、血压、静息心率、6min步行距离和左室功能无明显差异,6个月后各组死亡情况没有显著差别;A组总再次住院例次和心血管疾病再次住院比率明显低于B、C组(P均0.05);A组与运动训练前及B、C组比较静息心率明显下降,6min步行距离和LVEF显著增加(P0.01);3组血压和LVEDd无明显变化。结论:按运动处方进行步行训练方式对于心力衰竭患者的心脏功能康复是有效,并安全的。     

心脏再同步治疗是慢性心力衰竭伴心脏收缩不同步患者治疗的希望所在

慢性心力衰竭是各种心脏病发展的严重阶段,是目前心脏病学尚未解决的难题之一。超过4000例患者的随机临床研究业已证实,心脏再同步治疗（CRT）不仅能改善心力衰竭患者运动耐量、生活质量,而且能逆转心肌重构,降低病死率。CRT正在成为慢性心力衰竭患者的常规治疗方法,但临床实践仍有许多值得探讨的问题。     

Chronotropic incompetence does not contribute to submaximal exercise limitation in patients with chronic heart failure

The traditional view of the origin of breathlessness and fatigue in patients with chronic heart failure (CHF) includes the concept that a contributing factor might be a limitation to increases in heart rate termed 'chronotropic incompetence' during exercise. In order to examine the relationship of heart rate on workload, we calculated the ratio of workload to heart rate for peak exercise and for steady state tests at 15%, 25% and 50% of peak in controls and CHF patients. The workload/heart rate ratio during the peak tests was lower in patients than control subjects. For each steady state test, patients had a lower absolute workload, and lower oxygen consumption than controls, but the same heart rate at steady state, leading to a lower workload/heart rate ratio in patients than controls. In addition, although we found a relationship between heart rate and workload for control subjects (r=0.85; p<0.0001), there was no such relationship in patients with chronic heart failure (r=0.003; p=0.98) during steady state exercise. Patients with CHF have a lower peak heart rate but a greater heart rate for a given workload during submaximal testing suggesting that heart rate limitation is unlikely to be the cause but rather the consequence of exercise intolerance in CHF patients.     

运动改善慢性心力衰竭心肌损伤的临床研究

目的：评价运动治疗对改善慢性心衰患者心肌损伤的价值。方法：采用酶联免疫吸附试验一步夹心法检测18名健康体检者（正常对照组）以及76名慢性心力衰竭患者（NYHA心功能Ⅱ级24例、Ⅲ级29例、Ⅳ级23例）治疗（三组分别给予常规治疗或运动治疗）前、后的血清心脏型脂肪酸结合蛋白（H—FABP）、心肌肌钙蛋白（cTn）Ⅰ、肌酸激酶同工酶（CK—MB）,并作比较。结果：（1）各组心衰患者的CK—MB、cTnl、H—FABP测值均显著高于正常对照组（P〈0．05）;随心衰程度加重,H-FABP、cTnI水平亦随之上升,在各组之间的差别均有显著性（P〈0．05）,而CK—MB仅在NYHAⅡ级与Ⅳ级患者之间差别有显著性（P〈0．05）;（2）常规治疗组与常规治疗＋运动治疗组间的比较：两种治疗方案均可使各参数水平下降,但常规治疗＋运动治疗组这种改变更明显（P〈0．05）。结论：（1）慢性心力衰竭时存在心肌细胞的损伤,且随着病情的动态变化心肌损伤程度亦随之改变;（2）运动治疗可以显著改善慢性心衰患者的心肌损伤状态。