An exact diagnosis is important
because the treatment you receive depends on the type of tachycardia you have.
Supraventricular tachycardia can sometimes be
diagnosed simply on the basis of a
medical history and physical exam and a few
simple tests. Tests that may be done to
monitor your heart and diagnose the type of fast heart rate that you have
Electrocardiogram (EKG, ECG), which measures the electrical impulses in the heart. If an
electrocardiogram is done while the fast heart rate is occurring, it often
provides the most useful information.
Ambulatory electrocardiogram. A portable EKG, such as a Holter monitor, can record
your heart rhythm on a continuous basis, usually over a 24-hour period. If your
symptoms are infrequent, your doctor may use another type of ambulatory
electrocardiogram called a cardiac event monitor. When you have symptoms, you
activate the monitor, which records your heart rhythm.
Electrophysiology study. In this test, flexible wires are inserted into a vein, usually in
the groin, and threaded into the heart. Electrodes at the end of the wires
transmit information about the heart's electrical activity. Your doctor uses this information to see whether there is an extra electrical pathway inside the heart
and, if so, where it is located. Catheter ablation can be done during this test
to treat abnormal pathways and correct the supraventricular
Medicine trial. Giving certain medicines while you are
experiencing a fast heart rate, and monitoring what happens, may sometimes help
your doctor find out what type of fast heart rate problem you have.
After finding tachycardia, your doctor may need to search
for its cause. The specific tests needed depend on the particular tachycardia.
These tests may include:
This information is produced and provided by the National
Institute (NCI). The information in this topic may have changed since it was written. For the most current information, contact the National
Institute via the Internet web site at http://
.gov or call 1-800-4-CANCER.
WebMD Medical Reference from Healthwise
March 12, 2014
This information is not intended to replace the advice of a doctor.
Healthwise disclaims any liability for the decisions you make based on this