Cardiac Resynchronization Therapy (CRT) is a medical treatment designed to improve the heart's efficiency in patients with heart failure. It involves implanting a device, similar to a pacemaker, that sends electrical signals to both the left and right ventricles of the heart. This helps synchronize their contractions, allowing the heart to pump blood more effectively. CRT is typically recommended for patients with specific types of heart failure, particularly those with a condition called left bundle branch block. By improving the coordination of heartbeats, CRT can enhance quality of life, reduce symptoms, and lower the risk of hospitalization for heart failure.