Table 2.

Characteristics of the step response of renal vascular resistance

Experimental condition	n	Baseline (mmHg ml−1 min)	Minimum (mmHg ml−1 min)	Plateau (% of response)	Maximum of 1st response (% of plateau)	Maximum of 2nd response (% of baseline)
Control	8	0.38 ± 0.04	0.19 ± 0.02	35 ± 2	93 ± 3	119 ± 6
ACE inhibition	8	0.27 ± 0.02	0.17 ± 0.01	31 ± 4	91 ± 2	103 ± 2*
Control	8	0.29 ± 0.03	0.15 ± 0.02	45 ± 2	98 ± 2	120 ± 5
ACE inhibition + ANGII	8	0.48 ± 0.04*†	0.16 ± 0.02	51 ± 4†	105 ± 3†	139 ± 17

Baseline refers to renal vascular resistance (RVR) before the pressure reduction. Minimum refers to RVR immediately after pressure release. Plateau refers to RVR during the plateau expressed as a percentage of the total response between baseline and minimum. Maximum of the first response refers to the maximum RVR detected 2.5–10 s after release of the RAP reduction, expressed as a percentage of the level of the plateau. Maximum of the second response refers to the maximum RVR detected 25–80 s after pressure release, expressed as a percentage of baseline. Data are mean ± s.e.m.n, number of animals.

^*P < 0.05 vs. paired control.

^†P < 0.05 vs. ACE inhibition alone.