Cardiovascular effects of infusion of norepinephrine, epinephrine, isoproterenol, and dopamine in humans. Infusions were made intravenously during the time indicated by the broken lines. Heart rate is given in beats per minute, blood pressure in millimeters of mercury, and peripheral resistance in arterial blood pressure. (Reprinted with permission from Allwood MJ, Cobbald AF, and Ginsburg J. Peripheral vascular effects of noradrenaline, isopropyl-noradrenaline, and dopamine. Br Med Bull 19:132, 1963. Reproduced by permission of the Medical Department, The British Council.
mean arterial blood pressure, reflex slowing of the heart is usually not seen in humans.