My dad had a heart attack in 2008 while working and just before xmas at 58 and he had time to ring my mum and tell her he thought he was having an heart attack, still laugh at that to this day, some woman where he was working rang an ambulance and lucky they came in time and gave him the the help me needed, had to have a stent put in and is on medication now but check ups say he is fine now!
When I hear about people dieing from heart attacks I always think back and think how lucky he was.
RIP to your dad, make him proud and give him a good send off!