Cardiac Resynchronization Therapy (CRT)

Cardiac Resynchronization Therapy (CRT) is used to treat the symptoms and other complications associated with heart failure (HF). HF is a prevalent disease in which the pumping action of the heart is affected because the heart does not contract or relax properly.

CRT is administered using a pacemaker, called a CRT-P, or an implantable cardioverter defibrillator (ICD) with bradycardia pacing capabilities, called a CRT-D. The device is implanted just like a standard  pacemaker or ICD, except that a third pacing lead is added to help stimulate the heart’s left lower chamber (left ventricle or LV). Learn More About Heart Failure & Cardiac Resynchronization Therapy (CRT).

CRT stimulates both of the heart’s lower chambers so that they are more efficient in pumping blood to the body. The stimulation takes place via a pulse generator and pacing leads, which are placed next to the heart’s tissue.

The CRT-D or CRT-P is usually implanted under local anesthesia (similar to the anesthesia used by a dentist to numb gums). This means that there is minimal discomfort at the implant site, though you may feel some pressure. You will be relaxed, but awake, during surgery. The area where the doctors and nurses are working will be draped, so you won’t see anything. You will hear the doctors and nurses moving around you and they may talk during the procedure.

It’s normal to feel apprehensive before any surgery. Remember, though, that you and your physician have decided that this therapy is the best treatment for your particular condition. CRT should make you feel better and improve the quality of your life.

This information is provided as an overview. If you are nervous or have any questions, discuss your concerns with your physician.