You can't judge a book by its cover: a pseudo 1st degree A-V block in apparent absence of retrograde conduction.

摘要

We report 3 tracings from an electrophysiological study in which the appearance of a pseudo 1st degree A-V block helped to unmask the presence of a retrograde conduction, previously unrecognized. Our case highlights the importance in specific cases to have more than 2 intracardiac tracings during an electrophysiological study.