In-depth

Causes

Heart arrhythmias

Complications

Sudden death in young people

Sudden death in young people is rare, but those at risk can take precautions. Find out more about the risk factors, causes and treatments.

Prevention

Automated external defibrillators: Do you need an AED?

Symptoms

Fatigue

Heart palpitations

Heart palpitations are skipped, fluttering or racing heartbeats that aren't usually a symptom of a serious heart problem. Discover the causes and symptoms of this condition.

Tests and diagnosis

EEG (electroencephalogram)

Electrocardiogram

Genetic testing

Genetic testing is used to detect altered genes that may cause illness or disease. Although genetic testing can offer important health information, it has limitations.

Holter monitor

Nonstress test

Nonstress test — Overview covers definition and results of this prenatal test.

Treatments and drugs

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.

Oct. 27, 2015