Hello everyone...I wanted to find out more information about my father's heart health. Around 15 years ago he had a heart attack and since then he changed his lifestyle completely. He is 79 years old, but you would never guess because he has led such a health conscious lifestyle with eating and exercise. Last year he injured his knee which turned into a back problem which became so bad he had surgery. He recovered completely, but had a great deal of down time from his regular exercise. He got back on a routine shortly after, but recently his heart check-up revealed that his heart which was working at 35% dropped to 20%. He was told that he needed a defibrillator. My very loving parents who have been married 43 years and love their children very much like to keep things very private. When he had his heart attack he had a double bypass which was successful and has maintained with medication. They didn't want to share details and he always seemed so healthy that I have never worried. I realize now how ignorant I am about the seriousness of his condition. My sister told me he has a 30% chance of immediate death. I just want to know if this surgery will change anything for him. Will he ever regain more use of his heart or are all these percentages a kind of fate for him. I guess I am just looking for some hope.