Highlights the electrophysiological mechanism of alternating bundle branch block and PR intervals following transcatheter aortic valve replacement.
Alternating bundle branch block pattern on electrocardiogram (ECG) is a concerning finding with important prognostic implications. This ECG challenge explores the electrophysiological mechanism of a case of alternating bundle branch block with alternating PR intervals. (Level of Difficulty: Beginner.)
Kulkarni et al. (Tue,) studied this question.