My mom had smoked 3 packs a day all her life. She quit the first of this year. She had aortic valve replacement surgery on february of this year with a mechanical valve. She is taking 5mg of coumadin everyday and doing fabulous. I recently suspected she started smoking lightly but am not 100% sure of it. I know she needs to stop for good and will do whatever I can to help her achieve that. I understand all the risk related to smoking but my question is if the risk is higher to her heart after the surgery she's had and taking the coumadin? I would appreciate any information on this subject. Thanks in advance.