Complete heart block means that there’s a complete separation of electrical activity between the upper and lower chambers of the heart. Without prompt medical attention, it can be fatal. Your heart ...

First-degree heart block is the mildest type and often requires no treatment. Third-degree heart block is the most severe and often needs a pacemaker to regulate the heartbeat. Many different causes ...

An EKG can detect disruptions in the heart’s electrical activity, potentially indicating damage from a past heart attack, but it is most accurate when used with other tests. While an EKG can help ...