Hello, This Week My Father Who Is An Active 55

Hello,
This week my father who is an active 55 year old, (56 this year) survived a 100% blockage widow maker heart attack. It started while he was playing hockey that night and had and he felt very ill after taking a goal. He took his time at the gym and took a shower after leaving the game early and then drove home, waited for my sibling and his wife to get ready and took an aspirin in the meantime. They then drove him to the nearest hospital where he was sent on an emergency rescue to the main hospital of my state that has a great cardiology unit. He was immediately put into the Cath Lab where they gave him an angioplasty and stent. They also gave him I believe Plavix to break up blockages in other arteries as well. He was informed that he literally made it to that hospital with in minutes maybe seconds to save his life, and that the aspirin he took is the only reason why he made it that long. My question for you is, is there a period of time now where he is at high risk for another attack? I know that he is always at risk for having another, especially since my grandfather passed away from the same thing I just wanted to know if he has now increased chances? Also I was wondering if he did about 50% damage to his heart what is the approximate amount of years that could have been taken off of his life/possible life expectancy in years when the heart has that much damage? He is a non-smoker, eat healthy, exercises, however has diabetes he takes medication for as well as high blood pressure that he takes meds for her as well. He is now on blood thinners and some other meds for the heart attack.