In-depth

Atrial flutter

Bradycardia

Bundle branch block

Bundle branch block is a disorder that affects the electrical impulses traveling to your heart. It may be a sign of underlying heart disease.

Cardiomyopathy

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

Long QT syndrome is an electrical disturbance that can cause sudden, rapid heart rates. It can be genetic or a side effect of medication.

Multiple system atrophy (MSA)

Sick sinus syndrome

Tachycardia

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