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在临床上,有一部分快速性心律失常患者,虽经系统的抗心律失常药物治疗,均不能有效地控制心律失常的发作,或者不能耐受药物的副作用,称为难治性心律失常。其发生可由多种折返机制所致,但房室传导组织常参与折返激动,快速性室上性激动经此径路到达心室,引起所谓快速性心室反应。因此,不管心律失常起源于心房(房性心动过速、心房扑动、心房颤动)或房室
Clinically, some patients with tachyarrhythmia, despite systemic anti-arrhythmic drugs, are unable to effectively control the onset of arrhythmia or can not tolerate the side effects of drugs, known as refractory arrhythmia. Its occurrence can be caused by a variety of reentry mechanisms, but atrioventricular conduction often participate in reentry stimulation, rapid supraventricular activation by this path to the ventricle, causing the so-called rapid ventricular response. Therefore, regardless of the arrhythmia originating in the atria (atrial tachycardia, atrial flutter, atrial fibrillation) or atrioventricular