Summary Second-degree heart block occurs when electrical signals from the upper part of the heart are disrupted on their way to the lower part. Healthcare providers break it down into two types ...

Note the irregular R-R intervals making 3rd degree heart block unlikely. The rhythm on this ECG needs to be distinguished from high grade AV block which is a form of 3rd degree AV block that can ...

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 ...

Montpellier and Copenhagen have identified why some endurance athletes experience a heart rhythm disturbance called ‘heart block’. The University of Manchester-led study found that long-term exercise ...