Shape of the posterior mitral valve leaflet?

Shape of the posterior mitral valve leaflet?

• A. Triangular
• B. Quadrangular
• C. Circular
• D. Rectangular

Answer: (B)

The posterior mitral valve leaflet is described as quadrangular in outline because it forms a broad, four‑sided contour along the posterior wall of the left heart. It is divided into three scallops (P1, P2, P3) along its free edge, which gives it that four‑sided appearance when traced from the annulus to the edge. This contrasts with the anterior leaflet, which has a more triangular shape and lacks the same scalloped posterior border. Understanding this shape helps in recognizing normal anatomy and patterns seen in prolapse or repair.

The posterior mitral valve leaflet is described as quadrangular in outline because it forms a broad, four‑sided contour along the posterior wall of the left heart. It is divided into three scallops (P1, P2, P3) along its free edge, which gives it that four‑sided appearance when traced from the annulus to the edge. This contrasts with the anterior leaflet, which has a more triangular shape and lacks the same scalloped posterior border. Understanding this shape helps in recognizing normal anatomy and patterns seen in prolapse or repair.