Question: Will an implanted defibrillator prevent me from having a heart attack?
Answer: An implantable defibrillator will not prevent you from having a heart attack. But if you have a cardiac arrest, it will save your life.
Right now, the indication for an implantable defibrillator are someone who has already had a cardiac arrest, or someone who has very poor heart function, which increases the likelihood of cardiac arrest. And your physician, your cardiologist can tell you whether you're a candidate for an implanted defibrillator or not.