qrs wave group voltage QRS波群电压
Methods The voltage of QRS wave were measured with 12 leads electrocardiogram by electrocardiograph.
方法应用心电图机描记常规12导联心电图，按心电图测量标准测量QRS波群电压。
The second one is the circuit which deals with the heart rate, it selects th voltage comparator to collect the QRS wave in one cycle, and detect the rising edge to record the heart rate.
二是心率处理电路：选用电压比较器提取一个心电周期中的R波，检测上升沿个数以记录心率。
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