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70年代以来,心脏起搏技术已由治疗房室传导阻滞发展至防治快速性心律失常,并已至应用阶段,本文略作一慨要介绍。一、异位快速性心律失常发生的主要机理 1.异位起搏点存在增高的自律性,自动去极化作用明显增强,激动发放频率加快。可表现为早搏、心动过速。 2.激动传导异常系指激动的折返传导或环形运动。亦可表现为早搏、心动过速或扑动、颤动等。二、心脏起搏防治快速性心律失常的原理及方法。心脏起搏治疗快速性心律失常的机理,取决于起搏刺激的类型,心律失常发生的机理,异位心律发生的部位(即室上性还是室
Since the 1970s, cardiac pacing has been developed from the treatment of atrioventricular block to the prevention and treatment of tachyarrhythmia, and has reached the application stage, this article a little bit to be introduced. First, the main mechanism of ectopic tachyarrhythmia 1. Ectopic pacemaker there is an increase of self-discipline, the role of automatic depolarization was significantly enhanced, the excitement release frequency. Can be expressed as premature beats, tachycardia. 2. Excitation conduction abnormalities refers to the excited reentrant conduction or circular motion. Can also be manifested as premature beats, tachycardia or flutter, fibrillation and so on. Second, the principles of cardiac pacing and prevention of tachyarrhythmia and methods. The mechanism of cardiac pacing for tachyarrhythmia depends on the type of pacing stimulus, the mechanism of arrhythmia, the location of the ectopic rhythm (ie, supraventricular or ventricular