The systolic part of the heart (cardiac) cycle is when the heart muscle contracts and the heart chambers pump blood out to the lungs and the rest of the body.
| By | Healthwise Staff |
| Primary Medical Reviewer | E. Gregory Thompson, MD - Internal Medicine |
| Specialist Medical Reviewer | Robert A. Kloner, MD, PhD - Cardiology |
| Last Revised | August 5, 2010 |
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