In-depth

Complications

Premature birth

Symptoms

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

Chest X-rays

Echocardiogram

Electrocardiogram

MRI

MRI uses a magnetic field and radio waves to create detailed images of the organs and tissues within your body.

Dec. 16, 2014