Skip to Content
Home > Wellness > Health Library > Electrocardiogram (EKG) Components and Intervals
An electrocardiogram (EKG, ECG) is a test that measures the
electrical signals that control heart rhythm. The test measures how electrical
impulses move through the heart muscle as it contracts and relaxes.
The electrocardiogram translates the heart's
electrical activity into line tracings on paper. The spikes and dips in the
line tracings are called waves.
ByHealthwise StaffPrimary Medical ReviewerRakesh K. Pai, MD, FACC - Cardiology, ElectrophysiologyMartin J. Gabica, MD - Family MedicineSpecialist Medical ReviewerGeorge Philippides, MD - Cardiology
Current as ofJanuary 27, 2016
Current as of:
January 27, 2016
Rakesh K. Pai, MD, FACC - Cardiology, Electrophysiology & Martin J. Gabica, MD - Family Medicine & George Philippides, MD - Cardiology
To learn more about Healthwise, visit Healthwise.org.
© 1995-2016 Healthwise, Incorporated. Healthwise, Healthwise for every health decision, and the Healthwise logo are trademarks of Healthwise, Incorporated.
I Want To...
Our interactive Decision Points guide you through making key health decisions by combining medical information with your personal information.
You'll find Decision Points to help you answer questions about:
Get started learning more about your health!
Our Interactive Tools can help you make smart decisions for a healthier life. You'll find personal calculators and tools for health and fitness, lifestyle checkups, and pregnancy.
Feeling under the weather?
Use our interactive symptom checker to evaluate your symptoms and determine appropriate action or treatment.