Heart Block: Types, Causes, Symptoms, Treatment - Healthline
Heart block is a disruption in the electrical signals that control your heart. Your heart depends on a steady flow of electrical signals that start in the heart's upper chambers (atria). The signals then travel down the lower heart chambers (ventricles), triggering the ventricles to pump blood out of the heart into the lungs and to the rest of the body. Heart block occurs when there's an interference with this electrical activity between the atria and ventricles. A heart block is often the result of a heart attack or other injury to the heart, but it can have other causes. If the heart block is minor, treatment may not be necessary. If it's more severe, a pacemaker may be needed to restore healthy electrical activity in the heart. Read on to learn about the types of heart block, causes, symptoms to watch out for, and common treatments. A heart block, also known as an atrioventricular (AV) block, is classified by degree, based on how severe the electrical blockage is between...