In-depth

Symptoms

Bradycardia

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.

Nausea and vomiting

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

Stress test

Tilt table test

Treatments and drugs

Fainting: First aid

Feeling faint? What to do

Feb. 19, 2013