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

This is different than a first-degree atrioventricular ... of the RR or PP intervals until a P wave is blocked in the SA node, which would not appear on the ECG. A “sinus pause” ensues ...

Bradycardia is a condition characterized by a slower than normal heart rate. While a normal adult heart beats between 60 and 100 times per minute, bradycardia is defined when heart rate falls below 60 ...

The atrioventricular node (AVN) has mystified generations of investigators over the last century and continues today to be at the epicenter of debates among anatomists, experimentalists ...