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目的 报道反复单形房性心动过速（房速）的电生理特点和射频消融结果。方法 对８例反复单形房速患者进行心内电生理检查和射频消融治疗。结果 反复单形房速的发作方式与反复单形室性心动过速相似。房速时心电图ＰＰ间期和心内电图ＡＡ间期极不规则（２００～４５０）ｍｓ，平均最大与最小ＡＡ间期的差值为（１６９±７５）ｍｓ，但Ｐ波形态和心房激动顺序恒定。房速的病理机制为非折返性。成功消融８例患者的房速，其中７例的成功消融靶点位于肺静脉开口部或肺静脉内。平均随访（１０±２）个月，无１例复发。结论 反复单形房速是一种不同于阵发性或慢性房速的少见房性快速心律失常，能被射频消融术所根治。
Objective To report the electrophysiological characteristics and radiofrequency ablation results of recurrent atrial tachycardia (atrial tachycardia). Methods Eight patients with unilateral atrial tachycardia were subjected to electrophysiological examination and radiofrequency ablation. Results The incidence of repeated single tachycardia was similar to that of recurrent monomorphic tachycardia. Atrial tachycardia PP interval and ECG interval AA interval is very irregular (200 ~ 450) ms, the average maximum and minimum AA interval difference (169 ± 75) ms, but the P wave morphology and atrial activation The order is constant. The pathological mechanism of atrial velocity non-reentry. The ablation rate of 8 patients was successfully ablated. Among them, the successful ablation targets of 7 patients were located in the opening of pulmonary veins or pulmonary veins. The average follow-up (10 ± 2) months, no recurrence in 1 case. Conclusion Atrial tachycardia is a rare type of atrial tachyarrhythmia that is different from paroxysmal or chronic atrial tachycardia and can be cured by radiofrequency catheter ablation.