sir myself dr aniruddh tak dental surgeon, i had an heart attack 2 year ago and i have a stunt, i do regular exercise walk but even then i had an attack. my cholesterol is within normal limit, but with low HDL around 28, i was in delhi on January 11, when i got attack and also have family history of heart attack but in older age around 50 above. so i just wanna know the reason of my heart attack