Three-dimensional echocardiography and operative imaging of a false tendon connecting the left atrial wall to the anterior mitral leaflet

A 55-year-old woman was referred to our hospital for mitral valve regurgitation. An echocardiogram showed an anterior mitral leaflet prolapse and moderate mitral regurgitation, but neither elongation nor chordae cutting was observed. A tendon-like structure from the left atrial side of the foramen ovale to the anterior mitral leaflet …