Mobitz Type I, CTCAE

**Semantic type:** Finding

**Definition:** A disorder characterized by a dysrhythmia with a progressively lengthening PR interval prior to the blocking of an atrial impulse. This is the result of intermittent failure of atrial electrical impulse conduction through the atrioventricular (AV) node to the ventricles.

**Synonyms:** - AV Block Second Degree Möbitz Type I Adverse Event - AV Block-Second degree Mobitz Type I (Wenckebach) - Mobitz Type I - Mobitz type I - Mobitz type I