Sniper...Other factors could be making your breathing worse. Are you anemic? Are you vitamin deficient? Make sure you're up to snuff on your CD issues to ensure that everything that is happening is heart-related. Does your cardiologist understand the CD stuff?
On a personal note, I sent you a second email on 11/1 with writing suggestions, but never heard back from you. Just wanted you to know I didn't stop emailing. If other things seem more important to you now, I understand.
They have walkers now that have a chair seat, so you can sit down and rest when you get pooped. Medicare will pay for one if your doctor writes a prescription. Just a thought that it might be helpful to take along when you do your walks - at least until you get stronger.
Take care, my friend.