Almost complete absence of the posterior mitral valve leaflet is a rare congenital anomaly that can present in adulthood with mild or no symptoms despite varying degrees of mitral regurgitation.
Rare posterior mitral leaflet absence may present mildly in adults; hypothesis-generating for natural history and management.
We present a case series of two adult patients with almost complete absence of the posterior mitral valve leaflet and who are asymptomatic or mildly symptomatic, with two different degrees of mitral regurgitation.
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Parato et al. (2018) studied this question.
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