[Effect of inotropic factors in the postload characteristics of the heart].
It was shown in acute experiments on cats that the post-exercise characteristics of the left ventricle plotted as a dependence between the magnitudes of the maximal blood flow velocity and systolic intraventricular pressure in health and inotropic exposures are close to the linear ones. Adrenaline shifts the post-exercise characteristics upward and to the right, increasing both the maximal magnitude of the blood flow velocity at a zero pressure (velocity component) and the maximal magnitude of the pressure at a zero blood flow (force component), the latter rising to a greater extent. Calcium chloride and obsidan cause a parallel shift of the post-exercise characteristics: the force and velocity components diminish upon obsidan administration, while with CaCl2 they increase.
D000818:Animals; D001011:Aorta; D006328:Cardiac Catheterization; D002415:Cats; D004562:Electrocardiography; D004837:Epinephrine / Q000494:pharmacology; D006321:Heart / Q000502:physiology*; D006439:Hemodynamics; D008026:Ligation; D009200:Myocardial Contraction / Q000187:drug effects; D011433:Propranolol / Q000494:pharmacology
D011433:Propranolol; D004837:Epinephrine
Vliianie inotropnykh faktorov na postnagruzochnye kharakteristiki sertdsa.