Ana,
I had my defibrillator implanted
last July, in fact it was done on my 50th birthday.
A defibrillator
does not prevent
a heart attack, that is not what it is for. What it does is prevent SCA, Sudden Cardiac Arrest and death which accompanies that. I suffered three near fatal heart attacks since the implant was done and knew that the device was not at fault. I was supposed to be on medications for my heart problems and ran out, so, I had the heart attacks.