Will smoking after heart bypass harm me?

Yes knock it off: If the scar on the front of your chest doesnt convince you to stop smoking nothing will. Smoking will continue to damage your heart arteries and will also prematurely cause your grafts to fail. Never mind the ongoing risk of lung cancer, stroke, etc.

Yes: Smoking will cause your bypass grafts to close down prematurely. Studies show that the life span of a bypass is significantly shortened with the smoking (10+ years down to maybe a year or so). Do everything you can to stop smoking. If you can stop before your bypass surgery, even better as it will help in your postop recovery.