There are two types of CRT-
1) Cardiac Resynchronization Therapy Pacemaker (CRT-P)
- This device functions only as a pacemaker.
- It sends a mild electrical pulse to regulate the rate of ventricular contractions and restores a coordinated pumping action.
- It is an option for people who are not at high risk of developing life-threatening arrhythmias such as ventricular tachycardia.
2) Cardiac Resynchronization Therapy Defibrillator (CRT-D)
- This device combines a pacemaker and defibrillator in one device.
- It synchronizes the contractions of the ventricles like a CRT-P but it also senses and corrects dangerous arrhythmias that can develop in the ventricles.
- CRT-D may be right for people who are at a high risk of developing ventricular arrhythmias that may sometimes lead to sudden cardiac arrest or sudden cardiac death.