Negative dromotropic drugs are not always effective and may not be well tolerated in heart failure patients.
负性传导药物往往无效，心衰患者对这类药物的耐受性往往较差。
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。
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。
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