Does an implanted defibrillator prevent death from a heart attack?

Does an implanted defibrillator prevent death from a heart attack?

Heart attack is damage to a region of heart muscle due to blockage of a blood vessel supplying oxygenated blood to the heart. Sometimes the heart rhythm can get abnormal and life-threatening conditions known as ventricular tachycardia or ventricular fibrillation can occur in the setting of a heart attack. An implanted defibrillator can promptly detect and treat these abnormal rhythms known as arrhythmias and prevent sudden death.

Thus an implanted defibrillator can prevent sudden death due to heart attack indirectly. But a heart attack can rarely cause death in other ways like failure of pumping function of the heart known as heart failure and very rarely by rupture of the heart. These mechanisms cannot be prevented or treated by an implanted defibrillator.