title: [Mitral valve angle as a new diagnostic index of mitral valve prolapse].
mesh_terms: D000328:Adult; D003971:Diastole; D004452:Echocardiography; D006801:Humans; D008875:Middle Aged; D008943:Mitral Valve / Q000473:pathology*; D008945:Mitral Valve Prolapse / Q000175:diagnosis*; D013599:Systole