Pacemaker for Heart Failure (Cardiac Resynchronization Therapy)

Cardiac resynchronization therapy (CRT) uses a special type of pacemaker called a biventricular pacemaker (say "by-ven-TRICK-yuh-ler") to treat heart failure. This pacemaker for heart failure is a device that sends electrical pulses to make the ventricles pump at the same time. This type of pacemaker can improve your symptoms of heart failure. It can help you feel better so you can be more active. It also can help keep you out of the hospital and help you live longer.

When you have heart failure, the lower chambers of your heart (the ventricles) aren't able to pump as much blood as your body needs. Sometimes the heart has a problem with the electrical system that controls the pumping. This means the ventricles don't pump at the right time or the heart has an abnormal rhythm. A pacemaker for heart failure can help the heart pump blood better.

A biventricular pacemaker is implanted in the chest, and it connects to three thin wires, called leads. The leads go into different chambers of your heart. If there is a problem with your heartbeat, the pacemaker sends a painless signal through the leads to fix the problem. The pacemaker also can speed up your heart if it is beating too slowly.

In some cases, a person who has heart failure may get a pacemaker that is combined with a device that can shock the heart back to a normal rhythm if it is beating dangerously fast. The device is called an implantable cardioverter-defibrillator (ICD). It can prevent sudden death from certain types of abnormal heartbeats (life-threatening arrhythmias).

Cardiac resynchronization therapy may be used for people with severe heart failure (class III or class IV).¹

For more information and help deciding whether to get a pacemaker, see:

Heart Failure: Should I Get a Pacemaker (Cardiac Resynchronization Therapy)?

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