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Prosthetic Valve Auscultation — EECC MCQ

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EasyValvular Heart DiseaseProsthetic Valve AuscultationEECC

A 50-year-old man with a metallic heart valve click on auscultation asks how prosthetic valve sounds differ between mechanical and bioprosthetic valves. What are the expected auscultatory findings?

Educational content. Not a substitute for clinical judgement or local policy.

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Correct answer: D — Mechanical valves produce loud, high-pitched metallic clicks (opening and closing sounds clearly audible); bioprosthetic valves have soft or absent opening sounds similar to native valves — change in mechanical valve click intensity (muffled or absent) suggests possible valve dysfunction and warrants urgent investigation

Prosthetic valve auscultation is a valuable bedside skill: MECHANICAL valves: (1) bileaflet (St Jude): crisp, metallic closing click + softer opening click; (2) tilting disc (Björk-Shiley): similar metallic sounds; (3) ball-and-cage (Starr-Edwards): loud opening sound ('ball hitting cage') + closing click. BIOPROSTHETIC valves: produce sounds similar to native valves (soft S1/S2, no metallic component); mild flow murmurs are common and normal. RED FLAGS requiring urgent investigation: (1) muffled or absent mechanical valve click → suggests thrombus or pannus restricting leaflet motion; (2) new regurgitant murmur → paravalvular leak, endocarditis, or structural valve dysfunction; (3) new stenotic murmur with bioprosthetic valve → structural valve degeneration. The 2025 ESC VHD Guidelines recommend that patients learn to recognise their own valve sounds and report any change.

Reference: ESC/EACTS (2025): VHD Guidelines