A pacemaker is a small medical device that helps regulate the heartbeat. It is usually implanted under the skin near the heart and sends electrical signals to ensure the heart beats at a normal rate. People who have irregular heartbeats, known as arrhythmias, often need a pacemaker to maintain a steady rhythm and improve blood flow throughout the body. The device consists of a pulse generator and leads that connect to the heart. Advances in technology have made modern pacemakers more sophisticated, allowing them to adjust to the body's needs. This can significantly enhance the quality of life for patients, enabling them to engage in daily activities with greater ease and confidence.