I am a 63 year old male.15 years back I had heart attack and take regular medicines( B blockers,aspirine,diapatic,anti collastrol etc) also have regular moderate exercise.Now for the past 3 years I monitor my condition with annual check up with Ecco cardiogram,blood tests,Treadmil test,CT scan angiogram.All conditions are normal.No pain or discomfert with TMT modified bruce program.However I have 3 blocks in 3 arteries 80-90%,45-50% and 80%respectively.I am advised to under go coronary By pass surgery as a precaution and since my conditions are presently good.Is this the correct course of action or can I delay further or consider Non surgery CHELATION therapy.will this be better than BY pass and which doctor in chennai can do this.Thankyou