title: [Investigation of intratracheal cardiogram as a measure of myocardial contractility--study before and after infusion of isoproterenol in lactated ringer solution (author's transl)].
mesh_terms: D000818:Animals; D004285:Dogs; D004562:Electrocardiography; D006339:Heart Rate; D007263:Infusions, Parenteral; D007442:Intubation, Intratracheal; D007545:Isoproterenol / Q000494:pharmacology*; D007552:Isotonic Solutions; D009200:Myocardial Contraction; D014132:Trachea / Q000502:physiology*; D016276:Ventricular Function
chemical_list: D007552:Isotonic Solutions; D007545:Isoproterenol