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Conduction system of the heart

The heart's electrical signal travels through pathways (yellow). This stimulates your upper chambers (atria) and lower chambers (ventricles) to contract.

Primary Medical Reviewer Caroline S. Rhoads, MD
- Internal Medicine
Specialist Medical Reviewer Laurence Epstein, MD
- Cardiac Electrophysiologist
Last Updated January 18, 2007

WebMD Medical Reference from Healthwise

Last Updated: January 18, 2007
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