Abnormal EKG- Will IRBBB disqualify me for mommy makeover surgery?

You need a cardiac clearance not a new plastic surgeon. You are going for an elective procedure that has to be done in a safe manner. If you are deemed at high cardiac risk, then you need to reconsider your decision.

EKG readings come back with many different readings. Bundle branch blocks may mean something significant or not (surgically speaking). As long as you are cleared by a cardiologist, you should be stable to undergo general anesthesia.