When people refer to a cardiac resynchronisation therapy (CRT) device, they are actually discussing the system - the CRT device and the leads.
There are two types of CRT devices—a CRT pacemaker (CRT -P) and a CRT defibrillator (CRT -D). CRT-D devices, like all defibrillators, have a pacemaker function in them. Both devices help to coordinate the heart’s pumping action and deliver pacing therapy for a slow heart rate. However, the CRT-D can also treat fast heart rhythms.
All cardiac resynchronisation therapy devices are designed to use three leads. One lead is placed inside the right atrium, another lead is placed inside the right ventricle and the third lead is placed inside a vein on the outside of the left ventricle.
The energy needed for the CRT to work comes from a battery inside the device. How long your battery lasts depend on several factors. Some of these factors include the type of CRT you have, the nature of your heart condition, and how often your CRT provides therapy to your heart.
Because your CRT operates using a battery sealed inside the device, the entire device will need to be replaced when battery power falls to a low level. The leads only need to be changed in exceptional cases.
Information on this site should not be used as a substitute for talking with your doctor. Always talk with your doctor about diagnosis and treatment information.
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