My brother suddenly collapsed back in 1995 at the age of 51. He was basically dead until paramedics defibrillated him 3-4 times until they got a heart beat and put him on a ventilator. He never regained consciousness, was being kept alive on a machine, and was brain dead. They took him off the ventilator 2 days later and let his heart stop naturally. It was over in seconds.
I said MAJORITY of heart attack victims live long enough to make it to the hospital. Minority of heart attack victims suffer a massive attack and die quickly. As happened to my brother at age 79.
Where as if the main aorta has serious break, death is quick from loss of blood pressure.
With my own lifestyle of keeping weight in desired range and daily aerobic exercise for 27 minutes (365 days every year) I have no heart issues and normal EKG every time. Daily exercise has enormous benefits. I Don’t get colds, no flu, covid ran away in 36 hours without any medications, no joint pains, never had a fall, still can modify code of my computer software, play good chess & bridge. Still mowing my huge lawn with push mower. All from daily exercise at age 86.