We treated a patient with PCCD whose single left AT appeared as two different types on preoperative surface and intracardiac ECG from a pacemaker. The diagnosis was hindered by the fact that the conduction block encompassed interatrial block and the pacemaker A-wave was captured at the right atrial appendage.
Keywords: ablation; atrial tachycardia; electrocardiography; interatrial conduction disturbance; progressive cardiac conduction disturbance.
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