Newborn male with symptomatic bradycardia initially diagnosed with complete atrioventricular block. Isoproterenol drip was initiated, and the patient was scheduled for pacemaker implantation. During the hospital course, repeat electrocardiogram and Holter monitor revealed evidence of near continuous blocked atrial bigeminy with occasional aberrantly conducted premature atrial contractions. Flecainide was started, resulting in normal sinus rhythm, and the pacemaker implantation was cancelled.

中文翻译：

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有症状的心房二联症伪装成先天性完全性心脏传导阻滞

有症状性心动过缓的新生儿男性最初诊断为完全性房室传导阻滞。开始注射异丙肾上腺素，并安排患者植入起搏器。在住院期间，重复心电图和动态心电图监测显示有近乎持续的心房二联现象，偶尔会出现异常的房性早搏。开始使用氟卡尼，窦性心律恢复正常，起搏器植入被取消。