Day: September 7, 2026

Second-degree atrioventricular block (AV block) is a disorder of the heart’s electrical conduction system that has two main forms: type 1 AV block (Mobitz I or Wenckebach) and type 2 AV block (Mobitz II). Learn about their differences, causes, symptoms, and management.

First-degree AV block is not considered a “true blockage,” but rather a slowing of electrical conduction between the atria and the ventricles. It differs from second- or third-degree AV block, where some — or even all — impulses fail to pass through the AV node.