A directed MR jet suggests prolapse of which leaflet?

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Prepare for the Ultrasound Registry Review (URR) MV Abnormalities and Disease Test. Enhance your studies with quizzes, flashcards, and detailed explanations. Pass your exam with confidence!

Multiple Choice

A directed MR jet suggests prolapse of which leaflet?

Explanation:
A directed MR jet localizes the regurgitant orifice to a specific spot on the mitral valve, so you can infer which leaflet is prolapsing. When the anterior leaflet is involved, the regurgitant flow tends to be directed toward the posterior wall of the left atrium, producing a clearly directed, eccentric jet. This jet direction reflects the orientation of the orifice created by the prolapsing anterior leaflet. In contrast, posterior leaflet prolapse usually yields a jet directed toward the anterior left atrial wall. Therefore, a directed MR jet is most consistent with anterior leaflet prolapse.

A directed MR jet localizes the regurgitant orifice to a specific spot on the mitral valve, so you can infer which leaflet is prolapsing. When the anterior leaflet is involved, the regurgitant flow tends to be directed toward the posterior wall of the left atrium, producing a clearly directed, eccentric jet. This jet direction reflects the orientation of the orifice created by the prolapsing anterior leaflet. In contrast, posterior leaflet prolapse usually yields a jet directed toward the anterior left atrial wall. Therefore, a directed MR jet is most consistent with anterior leaflet prolapse.

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