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 ...

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 ...

Type I second-degree atrioventricular (AV) block should be defined ... the tracing as showing only type I block in virtually all the cases. On this basis, we believe that the reported cases of both ...