Vasodilator AgentsVasodilationPapaverineNitroprussideAcetylcholineVascular ResistanceNitric OxideForearmRegional Blood FlowEndothelium, VascularArteriolesNitroglycerinHyperemiaVasoconstrictionomega-N-MethylarginineNG-Nitroarginine Methyl EsterCoronary CirculationBlood PressureHemodynamicsCoronary VesselsNitric Oxide SynthaseBradykininBrachial ArteryAdenosineMesenteric ArteriesVasomotor SystemVasoconstrictor AgentsEndothelium-Dependent Relaxing FactorsDogsBlood Flow VelocityDose-Response Relationship, DrugMicrocirculationPulmonary CirculationEnzyme InhibitorsPlethysmographyArginineLaser-Doppler FlowmetryNitroarginineCalcitonin Gene-Related PeptideIndomethacinBiological FactorsEpoprostenolMuscle, Smooth, VascularHydralazineNitric Oxide Synthase Type IIIInfusions, Intra-ArterialArteriesCyclooxygenase InhibitorsSplanchnic CirculationRenal CirculationHeart RateRats, Sprague-DawleyIsosorbide DinitrateNitric Oxide DonorsHypertension, PulmonarySkinProstaglandinsPulmonary Artery15-Hydroxy-11 alpha,9 alpha-(epoxymethano)prosta-5,13-dienoic AcidCyclic GMPNorepinephrinePhenylephrineBretylium TosylateRats, WistarDipyridamoleCromakalimGlyburideCerebral ArteriesPerfusionMuscle TonusPia MaterHypertensionPotassium Channel BlockersBlood VesselsPotassium ChannelsAorta, ThoracicSodium NitriteAnoxiaMyographyGuanylate CyclaseAdrenomedullinEndothelin-1BenzopyransHindlimbCerebrovascular CirculationMethoxamineSwine8,11,14-Eicosatrienoic AcidIloprostFlushingSweatingSkin TemperaturePotassium ChlorideMuscle RelaxationAortaMinoxidilNitritesHydrazinesEndothelinsSympathetic Nervous System