En face demonstration of a prosthetic mitral valve orifice during left ventriculography

Direct demonstrate of the orifice of a prosthetic mitral valve was obtained using an en face projection of the mitral valve during left ventriculography. With a dimensional reference and planimetry, the mitral valve area was directly measured. The value for the mitral valve area derived from en face demonstration of the mitral valve during left ventriculography agreed well with valve area estimates obtained by the Gorlin and Gorlin formula and by direct examination of the surgical specimen.