I am Type 2 diabetic, and have atrial fib. Age: 69/male. When doing any amount of walking or stairs, some shortness of breath --- but most distracted by a pressure feeling around diaghram and rib area; to the extent that I have difficulty standing up straight, with back erect. Legs, hips, feet are strong; and still able to ambulate well, except for this back-bending frontal discomfort.