Pacemakers: How They Work (Heart)
Pacemakers: How They Work Device Normalizes Heartbeat The heart beats about 100,000 times each day. Each heartbeat begins with an electrical impulse from the heart’s natural pacemaker, the sinoatrial node (S-A node), found at the right atrium. The electrical impulse it produces travels across a pathway of heart muscle to the lower pumping chambers, causing …