title: Discordant left ventricular pressure and apexcardiographic pulsus alternans.
mesh_terms: D000293:Adolescent; D006328:Cardiac Catheterization; D006331:Heart Diseases / Q000175:diagnosis*; D006352:Heart Ventricles; D006801:Humans; D008297:Male; D010701:Phonocardiography; D011312:Pressure; D011674:Pulse