Effect of changes in heart rat on left ventricular performance in conscious dogs.
D000818:Animals; D001285:Atropine / Q000494:pharmacology; D004285:Dogs; D006321:Heart / Q000502:physiology*; D006339:Heart Rate; D006439:Hemodynamics; D009119:Muscle Contraction; D011312:Pressure; D011433:Propranolol / Q000494:pharmacology; D014159:Transducers; D016276:Ventricular Function
D001285:Atropine; D011433:Propranolol