EKG components and intervals
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EKG components and intervals
Illustration copyright 2002 by Nucleus Communications, Inc. All rights reserved. http://www.nucleusinc.com
An electrocardiogram (EKG, ECG) translates the heart's electrical activity into line tracings on paper. The spikes and dips in the line tracings are called waves.
The P wave represents the electrical activity in the atria. The Q, R, and S waves—called the QRS complex—represent the electrical activity in the ventricles. The T wave represents the electrical recovery, or repolarization, of the ventricles.
Credits
| Primary Medical Reviewer | Caroline S. Rhoads, MD - Internal Medicine |
| Specialist Medical Reviewer | Stephen Fort, MD, MRCP, FRCPC - Interventional Cardiology |
| Last Updated | May 14, 2007 |
| Last updated: | May 14, 2007 |
|---|---|
| Reviewed By: | Caroline S. Rhoads, MD - Internal Medicine, Stephen Fort, MD, MRCP, FRCPC - Interventional Cardiology |
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