I'm sorry Pater but I don't have a good suggestion for you here. I have not worked with patients/clients who have had their aortic valve replaced. The aortic valve is going to "see" the high pressures generated by the left ventricle as you lift and there is no way around this. As general suggestions I would keep getting the valve checked to see how it's doing and progress workloads extra slowly and cautiously. Hopefully the board will chime in with experience either coaching people or lifting after an aortic valve replacement.