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位相型传导阻滞是一种随心率改变而发生或消失的间歇性传导阻滞。Rosenbaum按照其与心肌动作电位的位相关系,将心率加快时出现的传导阻滞即心动过速依赖性传导阻滞命名为三相阻滞;将心率减慢时出现的传导阻滞即心动过缓依赖性传导阻滞命名为四相阻滞。为了加深对这类心电图及其临床意义的认识,现将我院1971～1981年收治的21例与心率改变有关的房室和束支
Positioning block is a type of intermittent conduction block that occurs or disappears as the heart rate changes. Rosenbaum according to its phase relationship with the myocardial action potential, the heart rate when the conduction block that is tachycardia-dependent block was named three-phase block; the heart rate slowed down when the conduction block that is bradycardia Dependent conduction block is named as four-phase block. In order to deepen the understanding of this type of ECG and its clinical significance, now our hospital from 1971 to 1981 admitted 21 cases of heart rate changes related to the atrioventricular and bundle