Your health care provider may advise a CRT for the following reasons:
- Prior attack of ventricular arrhythmia
- Previous history of heart attack
- Suffered a sudden cardiac arrest and survived
- Long QT syndrome
- Brugada syndrome
- Congenital heart disease or other underlying conditions for sudden cardiac arrest.
Reference : Implantable cardioverter-defibrillator: MedlinePlus Medical Encyclopedia. (n.d.). Retrieved from https://medlineplus.gov/ency/article/007370.htm