是指一次冲动下传后，又可顺着另一环形通路折回而再次兴奋原已兴奋过的心肌，称为折返激动。
心房扑动的发生机制是右房内的大折返激动。
It is known that the macro-reentry activation in the right atrium is the mechanism of atrial flutter.
目的探讨劳卡胺对折返激动有关心律失常的对抗作用及其机制。
Objective To investigate the effect of lorcainide on reentry related arrhythmias and its electrophysiological mechanisms.
多个研究认为复杂碎裂电图反映了局部折返激动，且与心脏自主神经兴奋有密切的关系。
Various studies have suggested that CFAEs represent re-entry of the fibrillatory waves, and there is a close relationship between CFAEs and cardiac autonomic ganglia.
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