In-depth

Causes

Brugada syndrome

Chagas disease

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.

Hyperthyroidism

Long QT syndrome

Lyme disease

Myocarditis

Complications

Amniotic fluid embolism

Aortic valve regurgitation

Enlarged heart

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

Gangrene

Heart failure

Mitral valve prolapse

Mitral valve prolapse occurs when the valve separating two of your heart's chambers malfunctions. The disorder usually isn't serious and often doesn't require surgical treatment.

Mitral valve stenosis

Premature ventricular contractions

Coping and support

Congenital heart disease in adults

Prevention

Automated external defibrillators: Do you need an AED?

Risk factors

Anemia

Cardiomyopathy

Symptoms

Bradycardia

Dizziness

Fatigue

Shortness of breath

Shortness of breath can be frightening. Most of the time, a heart or lung condition is the cause.

Snoring

Symptom Checker

Foot pain? Headache? Sore throat? Skin rash? Use the Symptom Checker to find out what's causing your symptom.

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.

Tests and diagnosis

Echocardiogram

Electrocardiogram

Holter monitor

Stress test

Tilt table test

Treatments and drugs

Cardiac ablation

Cardioversion

Implantable cardioverter-defibrillator

Pacemaker

A pacemaker can correct a heartbeat that's too slow. Find out the risks, results and recovery time of the procedure to implant a pacemaker.

July 31, 2014