title: [Echocardiographic study of electrical changes].
mesh_terms: D000328:Adult; D000368:Aged; D004452:Echocardiography; D005071:Evoked Potentials; D006801:Humans; D008297:Male; D008875:Middle Aged; D009200:Myocardial Contraction; D010490:Pericardial Effusion / Q000175:diagnosis*
vernacular_title: Estudio ecocardiográfico de la alternancia eléctrica.