Atrial flutter


Bundle branch block


Chagas disease

Enlarged heart

Enlarged heart is often a sign of a serious heart condition. Find out causes and treatments for enlarged heart.

Heart arrhythmias

Heart disease

Heart disease, usually thought of as blockages in the arteries that can cause a heart attack, can describe any medical condition affecting your heart.

Heart failure

Long QT syndrome

Multiple system atrophy (MSA)

Sick sinus syndrome


Tachycardia, a rapid heart rate, is caused by an abnormality in your heart's electrical impulses. Tachycardia can cause serious complications, including sudden cardiac arrest.

Ventricular tachycardia

April 10, 2013