[A Möbitz II atrioventricular block in a healthy male]

The case of a young, asymptomatic and otherwise healthy male with atrioventricular block Möbitz type II is presented. Contrary to the expectations, considering the type of the block, electrophysiologic study revealed only a vagotonic conduction delay in the atrioventricular node. The electrophysiological aspects and clinical significance of such a rare finding are discussed, especially in respect to Möbitz type II atrioventricular block.