my father is 80 years old...deciding between robotic lima to lad for a 95 percent blocked lad....right has been stented in past times 2 and now 100 percent blocked left is 75 percent blocked...dad not very active so no need to worry about athletic fitness per se...decision between traditional bypass to address more than one vessel or just do robotic minimally invasive....his heart is strong and right collateral vessels have been giving some help ...the circumflex is 60 percent blocked...