A pacemaker is a small electronic device that helps save lives by stabilizing the heart’s rhythm. It is located inside the chest to keep the heart at the right rate, particularly for those with irregular heartbeats or arrhythmias. Arrhythmias can prevent enough blood from flowing through the body, causing symptoms such as weariness, dizziness, fainting, and, in severe situations, heart failure. Pacemakers help the heart beat regularly by sending electrical signals, which improves the quality of life for those suffering from cardiac rhythm abnormalities.