Influence of activation site on measurements of myocardial inotropic reserve.
D000818:Animals; D016275:Atrial Function; D002302:Cardiac Output; D004285:Dogs; D006321:Heart / Q000502:physiology*; D006329:Heart Conduction System / Q000502:physiology*; D008433:Mathematics; D009200:Myocardial Contraction; D014463:Ultrasonography; D016276:Ventricular Function