CRT-D
Also written as: CRT-D — Cardiac Resynchronization Therapy Defibrillator
A combination device that provides cardiac resynchronization therapy and defibrillation capabilities for heart failure patients.
Full Definition
A Cardiac Resynchronization Therapy Defibrillator (CRT-D) combines the functions of a cardiac resynchronization therapy device with an implantable cardioverter defibrillator. The device uses three leads to pace both ventricles simultaneously, improving cardiac efficiency in heart failure patients, while also providing backup defibrillation for life-threatening arrhythmias. CRT-D devices are indicated for patients with heart failure, reduced ejection fraction, and electrical conduction delays.
Usage
Usage note: Distinguish clearly from CRT-P (pacemaker-only) devices.
In Context
- "The CRT-D device showed 95% biventricular pacing with significant improvement in ejection fraction." — Clinical outcomes study
- "CRT-D implantation requires careful left ventricular lead placement via the coronary sinus." — Surgical procedure manual