Many people are curious about the function of a pacemaker. A pacemaker works by delivering electrical impulses to regulate the heart's rhythm, restoring it to normal. This intervention significantly improves a patient's quality of life and can contribute to extending their life expectancy. It's important to distinguish that while pacemakers manage heart rhythm, implantable cardioverter-defibrillators (ICDs) are designed to deliver life-saving shocks for dangerous arrhythmias.