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The conduction system of the heart is the electrical system that powers it. If working properly this system provides a smooth, automatic heart rhythm allowing blood to flow and circulate efficiently through the body.
The structures involved in the conduction system of the heart include cardiac muscle cells consisting of two nodes and conduction fibers or pathways.
A healthy heartbeat starts with an electrical impulse from the sinoatrial node (SA) found in the right atrium. This cardiac node sets the rate and rhythm of the heartbeat. It's like a pacemaker. This electrical impulse travels to the atrioventricular node (AV) and then on to through the conducting fibers that then cause the ventricles to contract. This conduction system cycle repeats regularly.
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