This guide educates patients about Cardiac Resynchronization Therapy (CRT) device implantation, a biventricular pacemaker that helps coordinate heart contractions in heart failure patients by making both ventricles pump together. It covers the procedure process including pre-operative preparation, surgical implantation with three leads, post-operative care with activity restrictions, potential complications like infection or pneumothorax, follow-up requirements at the pacemaker clinic, and long-term device management.