VasodilationVasodilator AgentsForearmNitric OxideArteriolesNitroprussideEndothelium, VascularRegional Blood FlowAcetylcholineBrachial ArteryVascular Resistanceomega-N-MethylarginineHyperemiaNitroglycerinNitric Oxide SynthaseCoronary CirculationCoronary VesselsVasoconstrictionNG-Nitroarginine Methyl EsterBlood Flow VelocityBlood PressureLaser-Doppler FlowmetryAdenosineVasomotor SystemMicrocirculationEndothelium-Dependent Relaxing FactorsHemodynamicsEnzyme InhibitorsMesenteric ArteriesNitric Oxide Synthase Type IIIDogsNitroarginineBradykininDose-Response Relationship, DrugVasoconstrictor AgentsIndomethacinPlethysmographyPia MaterBiological FactorsInfusions, Intra-ArterialArginineCyclooxygenase InhibitorsSkinPulmonary CirculationRats, Sprague-DawleyBretylium TosylateNitric Oxide DonorsMuscle, Smooth, VascularArteriesHeart RatePotassium Channel BlockersPapaverineSweatingCerebral ArteriesSkin TemperatureGlyburideAnoxiaMyographyPotassium ChannelsRenal CirculationCalcitonin Gene-Related PeptideBody Temperature RegulationIsosorbide DinitrateCerebrovascular Circulation15-Hydroxy-11 alpha,9 alpha-(epoxymethano)prosta-5,13-dienoic AcidProstaglandinsCyclic GMPFlushingBlood VesselsSwineGuanylate CyclasePurinergic P1 Receptor AntagonistsPhenylephrinePulmonary ArteryNorepinephrineHypertensionPotassium ChlorideRetinal ArteryRats, WistarNitritesMethacholine ChlorideSplanchnic CirculationPerfusionEndothelin-1HydrazinesOxygen ConsumptionMicrodialysisReference ValuesMuscle, SkeletalSkin Physiological PhenomenaHypotensionHypercapniaIontophoresisMeningeal ArteriesMuscle TonusCheekSodium NitriteAorta, ThoracicVeratrineReflex