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 allows your doctor to see your heart in motion. Here's what you need to know about the test.

Fetal ultrasound

During pregnancy, fetal ultrasound allows your health care provider to check on your baby's growth and development. Find out more about the exam.

Treatments and drugs

Heart transplant

Aug. 24, 2012