A pacemaker is a small device implanted in the chest or abdomen to help regulate the heartbeat. It sends electrical signals to the heart to ensure it beats at a normal rate, which is crucial for maintaining proper blood flow and overall health. Pacemakers are often used for patients with arrhythmias, where the heart beats too slowly or irregularly. These devices can be temporary or permanent, depending on the patient's condition. Modern pacemakers are equipped with advanced technology, allowing them to adjust the heart rate based on the body's needs. They can significantly improve the quality of life for individuals with heart rhythm disorders.