[The role of the cardiac-pulmonary blood volume in the changes in left ventricle output during stimulation of the afferent fibers of somatic nerves].
Stimulation of tibial nerve afferent fibers has revealed heterogeneous shifts of left ventricular output, as well as pulmonary artery and posterior vena cava blood flow in anesthetized cats. Uniform changes in left ventricular output and pulmonary artery blood flow were noted in the majority of cases, with venous return most often exceeding pulmonary artery blood flow. beta-adrenoreceptor blockade failed to influence changes in pulmonary artery blood flow. It is concluded that the increase in pulmonary artery blood flow depends on the rise in venous return, but not on neurogenic influence upon the right ventricle. The reduction in left ventricular output is the result of decreased right ventricular outflow due to its overload caused by pulmonary vasoconstriction.
D000344:Afferent Pathways / Q000502:physiology; D000818:Animals; D001794:Blood Pressure; D001810:Blood Volume; D002302:Cardiac Output; D002415:Cats; D004558:Electric Stimulation; D009412:Nerve Fibers / Q000502:physiology*; D010525:Peripheral Nerves / Q000502:physiology*; D011433:Propranolol / Q000494:pharmacology; D011652:Pulmonary Circulation; D011943:Receptors, Adrenergic, beta / Q000187:drug effects; D013977:Tibia / Q000294:innervation; D016276:Ventricular Function
D011943:Receptors, Adrenergic, beta; D011433:Propranolol
Uchastie serdechno-legochnogo ob''ema krovi v izmeneniiakh proizvoditel'nosti levogo zheludochka pri stimuliatsii afferentnykh volokon somaticheskogo nerva.