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The conduction system of the heart is a specialized network of cardiac cells responsible for generating and transmitting electrical impulses that regulate the heartbeat. It ensures that the atria and ventricles contract in a coordinated and rhythmic manner. Knowledge of this system is particularly important in critical care nursing because disturbances in cardiac conduction can produce arrhythmias, alter cardiac output, and become life-threatening. The sinoatrial (SA) node is the primary pacemaker of the heart. It is located in the upper wall of the right _____ ______ __________ _______ __________ ______.
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