Mitral valve navigator. A new diagnostic tool for effective regurgitant orifice quantification in mitral regurgitation

Introduction Mitral regurgitation severity assessment is usually carried out using qualitative, semiquantitative, and quantitative parameters. The mitral valve navigation ( MVN ) tool allows to measure the mitral effective regurgitant orifice ( MERO ) from 3D echo datasets. Our aim was to validate the MVN as a new tool to quantify MERO . A secondary aim was to assess the intra‐ and interobserver variability. Methods This is a retrospective study...