Nitric Oxide DonorsNitroglycerinNitric OxideMolsidomineNitric Oxide SynthaseS-Nitroso-N-AcetylpenicillaminePenicillamineNitroprussideNitroso CompoundsVasodilator AgentsS-NitrosoglutathioneNitric Oxide Synthase Type IINitrogen OxidesIsosorbide DinitrateCyclic GMPNitric Oxide Synthase Type IIIVasodilationOxadiazolesNG-Nitroarginine Methyl EsterGuanylate CyclaseEnzyme InhibitorsNitratesNitric Oxide Synthase Type IHydrazinesNitro CompoundsTissue DonorsArginineomega-N-MethylarginineNitritesTriazenesMuscle RelaxationNicorandilSydnonesDose-Response Relationship, DrugEndothelium, VascularPentaerythritol TetranitrateS-NitrosothiolsAdministration, CutaneousSpermineCyclic GMP-Dependent Protein KinasesRats, WistarQuinoxalinesRats, Sprague-DawleyDrug ToleranceBlood PressureBlood DonorsAcetylcholineRuthenium CompoundsNitroarginineLiving DonorsCells, CulturedPlacental Function TestsFree Radical ScavengersMethylene BlueCoronary VesselsMuscle, Smooth, VascularVascular ResistanceVasoconstrictionPurinonesAzo CompoundsHemodynamicsRabbitsAortaDogsNitrosationHydroxocobalaminAorta, ThoracicGlutathioneIndazolesHeart RateTime FactorsPyrogallolPhenylephrineCyclic Nucleotide Phosphodiesterases, Type 5Amino Acid OxidoreductasesAdministration, SublingualPropaneRegional Blood FlowSuperoxidesOxidesArteriesOxidative StressVasoconstrictor AgentsPlacental CirculationMesenteric ArteriesSwinePhosphodiesterase InhibitorsCromakalimGlyburideForearmBradykininBlood Flow VelocityDisease Models, AnimalMuscle ContractionSuperoxide DismutaseDrug InteractionsCalcium Channel BlockersAnalysis of VarianceReactive Oxygen SpeciesCell Survival