Catheter Ablation of Long-Lasting Accelerated Idioventricular Rhythm in a Patient with Mild Left Ventricular Dysfunction
(a) The baseline 12-lead electrocardiogram (ECG) in the supine position shows accelerated idioventricular rhythm (AIVR) without atrioventricular conduction. The arrows indicate the P wave. (b) The ECG in the standing position immediately after exercise. The waveforms of limb leads in the standing position differ from those in the supine position.