1-Classic MVP: The parasternal long-axis view shows more than 2-mm superior displacement of the mitral leaflets into the left atrium during systole, with a leaflet thickness of at least 5 mm.
2-Nonclassic MVP: Displacement is more than 2 mm, with a maximal leaflet thickness below 5 mm.
3-Other: Other echocardiographic findings that should be considered as criteria are leaflet thickening, redundancy, annular dilatation, and chordal elongation.