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 ...

Dr. Paul Friedman answers the question: 'Heart Block versus Artery Blockage?' — -- Question: I have been diagnosed with heart block. How does this differ from blockage in one of my arteries?

Heart attacks often happen when something blocks blood flow in a heart artery. Atherosclerosis, or plaque build-up in your arteries, is the leading cause of heart attacks. You can make lifestyle ...

Arrhythmias, or irregular heart rhythms, are common complications of HCM. The thickened heart muscle disrupts the electrical pathways that coordinate heartbeat, leading to arrhythmias. Atrial ...