title: Factors predisposing to false negative M-mode echocardiograms in patients with two-dimensional echocardiographic criteria for mitral valve prolapse.
mesh_terms: D000328:Adult; D003937:Diagnosis, Differential; D004452:Echocardiography / Q000379:methods; D005260:Female; D006801:Humans; D008297:Male; D008945:Mitral Valve Prolapse / Q000175:diagnosis*