...Edward E. Soltis; Pamela S. Newman This study investigated the ontogeny of contractile and relaxation responses in aortic and tail artery preparations from 3-,7-, and 11-week-old male Sprague-Dawley rats. Contractile responses to norepinephrine, serotonin, KCl, electrical stimulation,and potassium...

... isolated ventricular muscles from 1-week-old and adult rabbits, concentration-response relationships of inotropic tension to isoproterenol, ouabain, norepinephrine and calcium were determined with and without reserpine pretreatment. Ventricular muscles from the newborn animals exhibited the same degree...

...,the maximum chronotropism by TYR was equal to that by norepinephrine (NE), indicating the development of functional sympathetic innervation to sinus node during this period. In ventricle, TYR responsiveness was low at birth and increased with age, indicating an increased sympathetic innervation during early...

...Moorkath Nandakumarana; Christiane Gardey; Elisabeth Rey; Jean-Claude Chattier; Maurice Panigel; Georges Olive The placental transfer from maternal to fetal circulation of ritodrine, a tocolytic agent used in obstetrics and of a structurally related physiologic catecholamine,norepinephrine...

... or safety. The publisher and the editor(s) disclaim responsibility for any injury to persons or property resulting from any ideas, methods, instructions or products referred to in the content or advertisements. Blood pressure Aorta Norepinephrine Acetylcholine Vascular reactivity Arterial medial...