Related Conditions

Arrhythmia

An abnormal heartbeat (arrhythmia) is any variation in the normal heartbeat. Abnormal heartbeats occur when the heart has an irregular heart...

Atrial fibrillation

Atrial fibrillation (say “A-tree-uhl fih-bruh-LAY-shun”) is an irregular heart rhythm (arrhythmia) that starts in the upper parts (atria) of the...

Ventricular fibrillation

Fast heart rhythms that begin in the lower chambers of the heart are called ventricular arrhythmias. They usually are fast and regular, such as...

Ventricular tachycardia

Ventricular tachycardia is a fast heart rhythm that starts in the lower part of the heart (ventricles). If left untreated, some forms of...