1/20/2024 0 Comments Heart of the many system shock 2![]() Your heart's electrical system should maintain: Heart rhythm, which is the synchronized pumping action of your four heart chambers.Heart rate, which is the number of times your heart beats per minute.Your heart's electrical system controls the timing of your heartbeat by regulating your: What controls the timing of your heartbeat? Regular, rhythmic electrical signals keep the heart pumping blood to the lungs and the body. These pathways transmit the signal from the upper to the lower chambers of the heart, which causes the heart muscle to contract. The heart's pacemaker sends out an electrical signal (impulse) that spreads throughout the heart along electrical pathways. These cells act as a pacemaker for the heart. Normally, the heartbeat starts in the right atrium in a group of special heart cells called the sinoatrial (or sinus) node. The two upper chambers are called atria (the right atrium and the left atrium), and the two lower chambers are called ventricles.
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