异丙肾上腺素是一种β受体激动剂,应用后对心脏有正性肌力、正性频率和正性传导的作用。临床用于治疗极缓慢性心律失常,给药后可使基本心率提高,传导阻滞程度减轻。除治疗心律失常外,心脏电生理检查中常用其促进诱发室上速和室速。绝大多数情况下,静注异丙肾上腺素后心率增快, Isoproterenol is a beta-agonist that exerts positive inotropic, positive, and positive conduction on the heart. Clinic for the treatment of very slow arrhythmia, after administration can improve the basic heart rate, reduce the extent of block. In addition to the treatment of cardiac arrhythmias, cardiac electrophysiology often used to promote the induction of supraventricular tachycardia and ventricular tachycardia. In most cases, intravenous isoproterenol heart rate faster,