Mitral valve showed no vegetations or prolapse.  There was mild-to-moderate regurgitation on color flow interrogation.  Aortic valve was well-seated mechanical valve, bileaflet with acoustic shadowing beyond the valve noticed.  No perivalvular leak was noticed.  There was increased velocity across the valve with peak velocity of 3.2 m/sec with calculated aortic valve area by continuity equation at 1.2 cm2 indicative of moderate aortic valve stenosis based on criteria for native heart valves.