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A CRT-P Pacemaker Works

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A Heart Failure ICD Works

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Cardiac Resynchronization Therapy

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Cardiac resynchronization therapy stimulates both of the heart’s lower chambers (and often one upper chamber) so they are “synchronized” and more efficient in pumping blood to the body.

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More doctors are prescribing electrical stimulation therapy earlier in the process of treating heart failure. There are two types of CRT devices:

CRT Pacemaker

Learn more about this device, also called a CRT-P.

CRT Implantable Cardioverter Defibrillator (ICD)
with pacing capabilities

Find out about this therapy, also called a CRT-D.

The stimulation takes place with a pulse generator (the pacemaker or ICD) and pacing leads (thin wires) that are placed next to the heart’s tissue to deliver specially timed pacing pulses to the heart.

Last Reviewed: April 25, 2011 V-00304