Cardiac Conduction

The sino-atrial (SA) node generates an impulse which stimulates atrial contraction. The ventricles are insulated from the atria by a layer of fat and connective tissue. To reach the ventricles the impulse must stimulate the atrio-ventricular (AV) node buried within the base of the right atrium. The AV node then generates an impulse which travels to the ventricles.



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reviewed 7/07