My father has undergone angiography and been diagnosed with left main & triple vessel disease, he is 80 years of age with history of diabetes melitus type 2 and hypertension. There is calcified coronaries an 60% block in left, and 90% block in other two arteries. He has been recommended immediate CABG. Can an 80 yo withstand this surgery, what risks are involved with the history of diabetes & hypertension, is there any possibility of a non invasive medication based treatment and what are the risk in that.