ECG is a commonly used heart function test in analysis of cardiac chronotropic and dromotropic, but it can not be used for detection of cardiac inotropic.
心电图是最常用的心功能检测方法，能监测心脏变时性和变传导性，但不能检测心脏的变力性。
Methods: the conditions of the two medicines on controlling premature ventricular beats, improving cardiac function and decreasing case fatality rate were compared by random and contrast test.
方法：采用随机对照试验比较两者对室早的控制、心功能的改善及降低病死率的情况。
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