Intropic effect of tachycardia and poststimulation potentiation in the conscious dog.
D000818:Animals; D004285:Dogs; D006339:Heart Rate; D006352:Heart Ventricles / Q000187:drug effects; D008365:Manometry; D010138:Pacemaker, Artificial; D011433:Propranolol / Q000494:pharmacology; D013997:Time Factors; D014159:Transducers; D014465:Ultrasonics; D016276:Ventricular Function
D011433:Propranolol