The atrioventricular node takes information about how fast the heart is beating from the sinoatrial node and relays it to the ventricles, the muscular portions of the heart that allow it to pump ...

Sinoatrial exit block occurs when the action potential initiated by the sinoatrial node is inhibited or ... This is different than a first-degree atrioventricular, or AV, block, which shows ...

A first-degree atrioventricular node block occurs when conduction through the AV node is slowed, thereby delaying the time it takes for the action potential to travel from the sinoatrial node ...