Chest pain or palpitations can signal hidden heart trouble. Know when an ECG test is needed, what results show, and when to seek urgent care.

Dr. Naccarelli answers the question: 'Heart Rhythm Meds Causing More Danger?' — -- Question: I have heard that the heart rhythm medicine that I am taking to keep my heart out of an abnormal heart ...

LA JOLLA, Calif. (KGTV) — A doctor at the University of California San Diego created a new way for physiologists to identify the source of irregular heartbeats. Dr. David Krummen created vMap, a ...

In addition to a physical exam, medical history, blood tests, and electrocardiograms (ECG or EKG) to diagnose atrial fibrillation (afib), your doctor may have you wear a heart monitor for a few days ...

Many arrhythmias have no clear cause; these idiopathic cases arise without identifiable triggers, while for others, the causes may be congenital or acquired.