What has NICE said?
Implantable cardioverter defibrillators are recommended as a possible treatment for people who have had a serious ventricular arrhythmia, who have an inherited heart condition linked to a high risk of sudden death, or who have had surgery to repair congenital heart disease.
Implantable cardioverter defibrillators, and cardiac resynchronisation therapy with defibrillation or pacing, are recommended as possible treatments for certain people with heart failure because of left ventricular dysfunction (see the guidance for more information).