Wife (age 48) had CABG x 4 1.5 yrs ago. Shes diabetic and takes insulin for 34 yrs. Was a smoker, 15 lbs overweight, former hi BP, has high cholesterol. She had bypassed her LAD (they usedthe IMA), 1st Diagonal, RCA and LcX OM1. Since that surgery her circumflex and OM2 branch closed and the RCA naive artery and graft - closed. Now the recent angiogram shows a 50% proximal blockage to her LAD native artery and a 40% blockage to her Left Main. When they do a bypass, is the Left Main (LMCA also bypassed with the LIMA (at time of surgery LMCA had 0% blockage)? Also if your native arteries sttart totally blocking does that affect the grafts? Thanks. I'm not getting any answers from the Drs and would rather know than not know.