钟摆样束支阻滞是指室上性激动下传心室时,室内传导出现的一种周期性改变,心电图特征表现为从一侧束支阻滞逐渐过度为对侧束支阻滞的图 Bell pendulous bundle branch block refers to the supraventricular activation of the heart chamber, the indoor conduction appears a cyclical changes in ECG characteristics from the side of the bundle branch block gradually over the contralateral bundle branch block diagram