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The heartbeat is governed by an electrical conduction system that produces efficient, wave-like contractions of the heart muscle. These motions propel the flow of blood in the single direction that it must move through the cardiac system in order to effectively provide oxygen to the body. This wave contraction as part of the heartbeat is critical to the heart and blood flow because it propels the blood—if it were to contract backwards, or not be an organized contraction, as can happen in arrhythmia and heart failure, then the blood does not move forward out of the heart and the blood will not move effectively to reoxygenate tissues. The wave contraction is the mechanism of action for the heart to pump blood, and its single direction is important to effectively propel the blood.
Cardiovascular Consultants. (2006). Physiology. Retrieved from: http://www.cardioconsult.com/Physiology/
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