text: safty about bypass? anterior coronary artery the safety of coronary artery bypass graft surgery is based on a number of things, including: 1. patient's age 2. patient's overall condition 3. concommitent illnesses (ie: diabetes mellitus, h/o stroke) 4. number of bypasses that need to be performed 5. any other procedures that need to be performed at the same time (ie: replace or repair a heart valve) 6. kidney function 7. experience of the surgeon  the surgeon that is performing the procedure can give an individualized risk assessment based on these and many other factors.