Obstruction Alternans: A Rare Presentation of Mechanical Mitral Valve Obstruction

摘要

class="kwd-title">Keywords: Mechanical mitral valve, Mechanical valve obstruction, Pannus formation, Echocardiography, Obstructive alternans class="head no_bottom_margin" id="sec1title">IntroductionMechanical valves have greater durability compared with bioprosthetic valves but are associated with distinct long-term complications. These complications include bleeding due to required oral anticoagulants, embolic events, and valvular obstruction. We present a case of a dysfunctional Medtronic-Hall tilting-disk mechanical mitral valve demonstrating a unique Doppler pattern of “obstruction alternans.”