the slopes of the positive pressure-diameter correlations obtained at each dose of the same vasoactive substance were higher for angiotensin than norepinephrine ( p less than 0.01 ) and epinephrine ( p less than 0.001 ) and were higher for norepinephrine than epinephrine ( p less than 0.05 ) .
C0028351
norepinephrine
C0014563
epinephrine