My MIL (78) is a heavy smoker with what I suspect (from family experience) to be COPD. She has high blood pressure controlled by meds. She was recently diagnosed with a 7 cm. AAA. Her surgeon advised her that surgery, in her condition, would entail possibly months on a ventilator. He told her to stop smoking, see a pulmologist and he would reconsider surgery in 6 months. She is going to get a 2nd opinion of course. My question is:Is it possible to regain lung function with rehab?