Detailed information on electrophysiological studies, including the reasons and preparation for the procedure, how the procedure is performed, after care, and an anatomical illustration of the electrical system of the heart

A pacemaker is a small device implanted under the skin that sends electrical signals to start or regulate a slow heartbeat.

With advances in technology, pacemakers and ICDs generally last several years and, in most cases, allow a person to lead a normal life.

Do cell phones interfere with pacemakers? Do ICDs need to be adjusted? Here are answers to these and other questions.

An arrhythmia is an abnormal rhythm of the heart that can cause the heart to pump less effectively.

Atrial fibrillation is a type of arrhythmia in which the electrical signals in the atria, or the two small chambers of the heart, are fired in a very fast and uncontrolled manner.