Vasopressin ( 0.1 U/min ) increased mean arterial pressure ( 57 + / -4 to 84 + / -2 mm Hg , P < .001 ) and systemic vascular resistance ( 813 + / -113 to 1188 + / -87 dyne-s/cm5 , P < .001 ) , with decreased norepinephrine administration .
