Pacemakers and ICDs are life-saving devices that help regulate heart rhythms. In this video, Dr. Malcolm Finlay, a cardiologist and cardiac electrophysiologist, explains how pacemakers treat slow heartbeats and how ICDs (Implanted Cardioverter Defibrillators) protect against dangerous fast heart rhythms. Learn how these tiny implants work, who might need them, and what to expect from the procedure.