In prosthetic valve assessment, which finding indicates prosthetic dysfunction beyond gradient changes?

In prosthetic valve assessment, which finding indicates prosthetic dysfunction beyond gradient changes?

• A. New or worsening regurgitation.
• B. Decreased gradients across the prosthesis.
• C. Stable gradients over time with no regurgitation.
• D. Paravalvular leaks are never seen.

Answer: (A)

New or worsening regurgitation best indicates prosthetic dysfunction beyond gradient changes. Gradients reflect how open the valve is to forward flow, so they can vary with loading conditions and may not reveal a mechanical problem. If a prosthetic valve shows a new or increasing amount of backward flow around the valve, that signals a failure of sealing or leaflet function, such as a paravalvular leak or intravalvular regurgitation, which is a true dysfunction beyond what gradients alone show. Decreased gradients would suggest less obstruction, not dysfunction, and stable gradients with no regurgitation point to normal, stable function. Paravalvular leaks can occur and are a sign of dysfunction when present, so the notion that they are never seen is incorrect.

New or worsening regurgitation best indicates prosthetic dysfunction beyond gradient changes. Gradients reflect how open the valve is to forward flow, so they can vary with loading conditions and may not reveal a mechanical problem. If a prosthetic valve shows a new or increasing amount of backward flow around the valve, that signals a failure of sealing or leaflet function, such as a paravalvular leak or intravalvular regurgitation, which is a true dysfunction beyond what gradients alone show. Decreased gradients would suggest less obstruction, not dysfunction, and stable gradients with no regurgitation point to normal, stable function. Paravalvular leaks can occur and are a sign of dysfunction when present, so the notion that they are never seen is incorrect.