NitroprussideFerricyanidesVasodilator AgentsNitric Oxide DonorsNitric OxideVasodilationAcetylcholineCyclic GMPForearmHypotension, ControlledEndothelium, Vascularomega-N-MethylarginineNG-Nitroarginine Methyl EsterPhenylephrineVasoconstrictor AgentsNitric Oxide SynthaseGuanylate CyclaseTrimethaphanMuscle RelaxationArginineS-Nitroso-N-AcetylpenicillamineBlood PressureRegional Blood FlowNitroargininePenicillamineEnzyme InhibitorsOxadiazolesMolsidomineDose-Response Relationship, DrugVascular ResistanceVasoconstrictionNitroglycerinBradykininBaroreflexMuscle, Smooth, VascularAorta, ThoracicArteriolesPlethysmographyMethylene BlueNorepinephrineHemodynamicsVasomotor SystemHeart RateInfusions, Intra-ArterialMicrocirculationPurinonesCromakalimMesenteric ArteriesArteriesIontophoresisNitroso CompoundsRats, WistarRats, Sprague-DawleyAorta15-Hydroxy-11 alpha,9 alpha-(epoxymethano)prosta-5,13-dienoic AcidDibutyryl Cyclic GMPSympathetic Nervous SystemMuscle ContractionDogsQuinoxalinesCoronary VesselsCyanidesPressoreceptorsHypertensionSodium NitriteCyclic GMP-Dependent Protein KinasesHydrogen CyanideRabbitsLaser-Doppler FlowmetryHypotensionS-NitrosoglutathioneHydroxocobalaminVerapamilBiological FactorsAmino Acid OxidoreductasesRats, Inbred WKYNitric Oxide Synthase Type IIIMuscle, SmoothIndomethacinPotassium ChlorideInjections, Intra-ArterialProstaglandin Endoperoxides, SyntheticSwineCoronary CirculationMuscle TonusHyperemiaBenzopyransFree Radical ScavengersAdenosineHydrazinesCardiac OutputPulmonary CirculationApaminBlood Flow VelocityNitrogen OxidesRats, Inbred SHRAtrial Natriuretic FactorIsoproterenolPulmonary ArteryNitrates