If both mitral leaflets prolapse, the MR jet angle is:

If both mitral leaflets prolapse, the MR jet angle is:

• A. Inferiorly
• B. Anteriorly
• C. Centrally
• D. Posteriorly

Answer: (C)

Mitral regurgitation jet direction reflects where the regurgitant orifice sits on the mitral valve. If only one leaflet prolapses, the jet tends to be directed toward the opposite wall of the left atrium—an anterior leaflet prolapse pushes the jet posteriorly, a posterior leaflet prolapse pushes it anteriorly. When both leaflets prolapse, the regurgitant orifice is effectively centered in the mitral valve orifice, so the backward flow enters the left atrium in a central trajectory rather than toward either wall. That central flow pattern is why the central jet is the best answer.

Mitral regurgitation jet direction reflects where the regurgitant orifice sits on the mitral valve. If only one leaflet prolapses, the jet tends to be directed toward the opposite wall of the left atrium—an anterior leaflet prolapse pushes the jet posteriorly, a posterior leaflet prolapse pushes it anteriorly. When both leaflets prolapse, the regurgitant orifice is effectively centered in the mitral valve orifice, so the backward flow enters the left atrium in a central trajectory rather than toward either wall. That central flow pattern is why the central jet is the best answer.