title: Echocardiographic examination in left ventricular alternans.
mesh_terms: D000328:Adult; D004452:Echocardiography; D006347:Heart Sounds; D006352:Heart Ventricles / Q000503:physiopathology*; D006801:Humans; D008297:Male; D008943:Mitral Valve / Q000503:physiopathology; D011674:Pulse