Also known as complete heart block, third-degree heart block is the most serious type of heart block. Considered a medical emergency, it can be fatal without prompt treatment. The steady beating of ...

First-degree heart block is the mildest type and often requires no treatment. Third-degree heart block is the most severe and ...

There are three types of second degree heart block, also called atrioventricular (AV) block. In type I the signal sometimes does not reach the ventricles, causing skipped beats. It is often benign and ...

People with third degree heart block have an irregular heartbeat due to a total blockage of the electrical impulses that control the heart’s activity. It can lead to faintness and breathing difficulty ...