I received an aortic homograft valve replacement 17.5 years ago at age 45, but now I have severe regurgitation and am going to have my second OHS soon. It was great the first 14 years or so, but I have had slowly progressive loss of exercise tolerance over the past few years. I climbed Mount Rainier 4 times with the homograft, but now become short of breath climbing a flight of stairs. I am opting for a mechanical valve this second time around to hopefully avoid a third OHS in the future. I also want to avoid this pre-replacement loss of energy for several years ago before another replacement.