摘要
为了更加全面地研究和评估心肌的变时性和变力性,研制了能够在运动场地同时采集心力和心率的心音信号遥测系统。采集了50名体育系学生和30名其他系学生在完成规定运动量的登梯运动后,5min内连续变化的心音信号。对采集的数据经过3次样条插值、均匀采样和小波变换滤波后,得到了平滑的心力恢复趋势曲线和心率恢复趋势曲线。统计分析表明,大负荷运动量下的心脏储备主要来自于心力储备而不是心率储备(P<0.001),和其他系学生相比,体育系学生具有的高水平心功能不仅在于具有更大的心力储备指数(P<0.001),而且还在于具有更快的心力恢复速度(P<0.001)。同时检测心力恢复趋势与心率恢复趋势会有益于全面评估心脏功能。
To study and evaluate myocardial inotropism and chronotropism more comprehensively, a heart sound telemetry system with simultaneously sampling signals of cardiac contractility and heart rate at the sports site was developed. Five-minute continuous heart sound signals were sampled respectively from 50 students in physical education department and 30 students in other departments after completing designed workload during step-climbing exercise. Smooth cardiac contractility recovery trend curves and heart rate recovery trend curves were obtained by processing the data through cubic spline interpolation,evenly sampling and wavelet transform filtering. Statistical analysis showed that the cardiac reserve under the heavy exercise workload mainly depends on the cardiac contractility reserve rather than the heart rate reserve (P<0.001). Compared with the students of other departments, the high level cardiac contractility reserve of the students in physical department may be reflected not only in cardiac contractility reserve, but also in faster cardiac contractility recovery rate (P<0.001). Simultaneous measuring of both cardiac contractility recovery trend and heart rate recovery trend after exercise might be beneficial to comprehensive evaluation of cardiac function.
出处
《生物物理学报》
CAS
CSCD
北大核心
2004年第5期403-407,共5页
Acta Biophysica Sinica
基金
国家自然科学基金项目(30270377)
关键词
心力储备
心率储备
心力恢复
心率恢复
遥测
Cardiac contractility reserve
Heart rate reserve
Cardiac contractility recovery
Heart rate recovery
Telemetry
