Table 2.

FBF responses to infusion of PGI₂ and SNP with and without co-infusion of L-NMMA

FBF (ml•dl−1 FAV•min−1)
Drug	Young	Older	Co-infusion
PGI (ng•dl−1 FAV•min−1)			Normal Saline
Baseline	1.86 ± 0.27	2.12 ± 0.23
2.5	3.93 ± 0.72	3.04 ± 0.30
5.0	6.19 ± 0.93	5.12 ± 0.47
10.0	7.81 ± 0.86	6.23 ± 0.57
SNP (mcg•dl−1 FAV•min−1)
Baseline	2.69 ± 0.35	2.75 ± 0.31
0.25	6.63 ± 0.85	5.11 ± 0.65
0.50	9.82 ± 0.83	9.07 ± 0.79
1.0	12.72 ± 0.93	11.55 ± 0.98
PGI (ng•dl−1 FAV•min−1)			L-NMMA
Baseline	1.71 ± 0.16	1.67 ± 0.13
2.5	2.47 ± 0.29	2.26 ± 0.19
5.0	4.14 ± 0.49	4.06 ± 0.53
10.0	5.69 ± 0.54	5.34 ± 0.72
SNP (mcg•dl−1 FAV•min−1)
Baseline	1.93 ± 0.19	1.67 ± 0.16
0.25	5.34 ± 0.80	4.87 ± 0.56
0.50	8.38 ± 0.82	8.51 ± 0.72
1.0	9.96 ± 0.92	11.53 ± 1.02

Values are mean ± SEM. FBF=forearm blood flow, SNP=sodium nitroprusside, PGI=epoprostenol.