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目的:探讨在腔内心电图上表现为房室同时激动的房性心动过速(AT)的电生理特征。方法:对4例房室同时激动的AT患者的电生理资料进行分析。结果:AT并发房室结缓慢前传时,A波可与滞后的V波融合,使腔内心电图表现为房室同时激动,易误诊为典型房室结折返性心动过速。结论:AT时房室也可同时激动,规范、细致的电生理检查是避免误诊的关键所在。
Objective: To investigate the electrophysiological characteristics of atrial tachycardia (AT) with simultaneous atrioventricular tachycardia in the endocardium. Methods: The electrophysiological data of 4 patients with concurrent atrioventricular tachycardia were analyzed. Results: When AT complicated with atrioventricular nodus, A wave can be merged with lagging V wave, which makes the intracavitary ECG appear as atrioventricular simultaneous activation and is easily misdiagnosed as typical atrioventricular nodal reentrant tachycardia. Conclusion: Atrioventricular nocturnal ventricular tachycardia can also be excited at the same time. Standardized and detailed electrophysiological examination is the key to avoid misdiagnosis.