What do you suggest if my dad age 62 is diabetic patient and is suffering from 80% artery blockage.?

Atherosclerosis: Hi. Your Dad first of all needs treatment for the 80% artery blockage (stent, bypass, or medical treatment depending on the lesion - his doc will recommend appropriate therapy). He also needs really good diabetes, blood pressure, & cholesterol control. He needs to never smoke. He needs good anti-platelet therapy (aspirin, clopidogrel, etc). Good luck to him.