sinus tachycardia, with ventricular premature complexes continue
contraction 房性期前收缩sa node 窦房结av node 房室结tachycardia
卫生 临床医学 正常心电图教学2007ppt heart rate in normal sinus
figure ventricular tachycardia
窦性心动过速sinustachycardia
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