Cardiac Resynchronization Therapy (CRT) is a medical procedure used to treat certain types of heart failure. It involves the implantation of a device called a biventricular pacemaker or a cardiac resynchronization therapy defibrillator (CRT-D).
In heart failure, the heart's chambers may not beat in a synchronized manner, causing inefficient pumping of blood. CRT aims to restore the normal synchrony of the heart's electrical signals and improve its overall function. The procedure is typically recommended for individuals with moderate to severe heart failure symptoms despite optimal medical therapy, particularly those with a specific type of heart rhythm abnormality known as left bundle branch block.