title: [Echocardiographic determination of the changes in ventricular ejection volume caused by changes in the atrial contraction time in patients with pacemakers].
mesh_terms: D000328:Adult; D000368:Aged; D002302:Cardiac Output; D004452:Echocardiography; D005260:Female; D006325:Heart Atria; D006327:Heart Block / Q000503:physiopathology* / Q000628:therapy; D006801:Humans; D008875:Middle Aged; D009200:Myocardial Contraction; D010138:Pacemaker, Artificial; D013318:Stroke Volume
vernacular_title: Determinatión ecocardiográfica de las modificaciones del volumen eyectorio ventricular inducidas por variaciones en el tiempo de la contracción atrial en pacientes con marcapasos.