ActiveLarry,A poor prognosis simply means the patient and caregiver must take lifestyle changes and rehab extremely seriously. I am 10 years post bypass surgery, and know people who are 20 and 30 years surviving bypass surgery. Your loved one had other health issues. Rehab should not cause any severe exertion. Totally unnecessary. I know; mine started very gradual, stayed gradual and methodical. Success comes in small increments, and takes time. Not just 12 or 24 or 36 weeks. It is ongoing. We either slowly improve, or slowly decline. Improvement is always good to see and feel, and raises one's spirits.