After the Coronary Angiography of my father who is 60 years of age (Non smoker, non alcoholic, can do brisk walking of 5-6 kms dails without any angina, controlled diabetes for last 2 years with medication). He has Angio results as follows:1) Origin: Normal 2) LMCA: Normal 3) LAD: Type III vessel proximal LAD (100%) with retrograde filling from collaterals4) LCx : Non Dominant, OM3 80% lesion 5) RCA: Dominant, normal Please suggest.Thanks.