Figure 5

Effects of phenylephrine on time-related changes in HR caused by tilting in anesthetized rats. Open circle and triangle; Unstressed rats and closed circle and triangle: SART-stressed rats. Data show the mean ± S.E.M. of 7 unstressed and 9 SART-stressed rats. Phenylephrine 1 mg/kg/min, was continuously administrated by i.v.-infusion from 15 min before tilting.