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Percent recovery in FBF (A) and forearm vascular conductance (FVC; B) during balloon inflation (protocol 1; n = 9). Nitric oxide synthase inhibition (l-NMMA) reduced the % recovery of FBF and FVC compared with the respective % recovery during the control (no drug) trial. Percent recovery of FBF and FVC was reduced even further with combined l-NMMA-aminophylline compared with the l-NMMA trial. *P < 0.01 vs. control (no drug); †P < 0.01 vs. l-NMMA alone.
