六分钟步行实验心率和心力变化测试及临床研究

A Study on 6-Minute Walk Test Incorporating Cardiac Contractility And Heart Rate Change Measurements

目的:研究在6min步行试验中加入心力变化趋势和心率变化趋势测试和评估方法及其临床应用。方法:心血管病患者25人和无心血管病者25人自愿加入该对照研究。完成6min步行试验运动后S1幅值对安静时S1幅值增加的相应倍数定义为心力变化趋势CCCT(6')。结果:两组受试者6min步行试验中步行的总距离、心力和心率数据间都有非常显著的差异。结论:提示该项研究所用方法能克服单纯用6min步行试验中步行距离来评估心功能所存在的问题,具有无创、安全、简便、快速、费用低、可重复采用和客观等特点,能用于病室和门诊测评心脏储备。

Objective:Studying6-minite walk test incorporating cardiac contractility change trend and heart rate change trend measurements and its clinical applications.Methods:25patients with cardiovascular diseases and25subjects without cardiovascular diseases were included this study.Signals of cardiac cycle and cardiac contractility were si-multaneously collected and recorded before and immediately after6-minite walk test.The total distance during6-minite walk test also recorded.The increase of the amplitude of the first heart sound after6-minite walk test,with respect to the amplitude of the first heart sound recorded at rest was defined as cardiac contractility change trend(CCCT(6')).Results:It was found that there was a very significant difference between the two sets of data of walking distance,cardiac contractility change trend,and heart rate change trend.Conclusion:The results show that the method of6-minite walk test incorporating cardiac contractility change trend and heart rate change trend measurements can be used for evaluating cardiac function,with the advantages of being noninvasive,safe,convenient,inexpensive,rapid,simple,objective,repeatable,and able to be performed at the bedside,in the outpatient department.