Mobitz I atrioventricular block

What it means

Progressive PR interval prolongation with the subsequent occurrence of a single nonconducted P wave that results in a pause. The pause that follows the nonconducted impulse is less than fully compensatory (less than the sum of two normal sinus intervals).

Mobitz I atrioventricular block is associated with a normal QRS duration.

Rare diseases that can present with this2

The range is how often this sign appears among people diagnosed with each disease — it is not a probability of having any of them. Many of these signs also occur in common, non-rare conditions. A sign on this page is a conversation to have with a clinician, not a conclusion.

Part of the broader category

Also called: Mobitz type 1 atrioventricular block · Wenckebach block