Electrocardiographic and Electrophysiological Characteristics of Atrial Tachycardia With Early Activation Close to the His‐Bundle

Radiofrequency (RF) ablation of atrial tachycardia (AT) with earliest activation at the His‐bundle may be associated with the risk of AV block, and detection of this AT origin using the electrocardiogram (ECG) would be helpful in planning ablation. Aim of this study was to characterize the P‐wave morphology and intracardiac electrograms at the successful ablation site for this group of ATs.

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