I have absolutely no medical background (or knowledge) but I find it baffling how people drop dead from a heart attack without any medical interventions. I rec

I have absolutely no medical background (or knowledge) but I find it baffling how people drop dead from a heart attack without any medical interventions. I received an over 40 MOT (a few years back) and despite being overweight and slightly above cholesterol was told I was low risk - it seems to be if you don't smoke or drink you're in the clear. Similarly, I just did the Framingham test and got a 2.2 % 10-year risk of MI or death for this patient, which is nice. However, it all seems so hit and miss. You'd think there should be a way to screen on a regular (yearly) basis to detect for risk factors.