accordingly , forearm blood flow , forearm vascular resistance , mean and phasic arterial pressure , cardiac output and plasma norepinephrine , epinephrine and dopamine were measured during atrial , ventricular and v-a pacing at a cycle length of 600 ms ( 100 beats/min ) before and after regional alpha blockade with intraarterial phentolamine in 16 patients with a left ventricular ejection fraction greater than 35 % and little or no symptoms of congestive heart failure .
C0028351
norepinephrine
C0014563
epinephrine