The vibration signal from heart activity was recorded, and the walking distance during the 6 minute walk test was measured.
记录运动前后心脏活动所产生的振动信号，测量第一心音幅值和6分钟步行试验中步行的距离。
Objective To investigative the correlations between QRS duration(QRSD) and heart function and 6-minute walk test(6-MWT)in elderly patients with chronic heart failure(CHF).
目的探讨老年慢性心力衰竭（心衰，CHF）患者QRS时限（QRSD）与心功能、运动耐量相关性。
Objective To investigative the correlations between QRS duration(QRSD) and heart function and 6-minute walk test(6-MWT)in elderly patients with chronic heart failure(CHF).
目的探讨老年慢性心力衰竭（心衰，CHF）患者QRS时限（QRSD）与心功能、运动耐量相关性。
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