AortaMuscle RelaxationAorta, ThoracicAorta, AbdominalRelaxationRelaxation TherapyVasodilationMuscle, Smooth, VascularEndothelium, VascularAcetylcholineNitric OxideVasodilator AgentsMuscle ContractionNitroprussideNitroarginineMuscle, SmoothBiological FactorsVasoconstrictor AgentsMesenteric ArteriesRabbitsAortic DiseasesCyclic GMPDose-Response Relationship, DrugNG-Nitroarginine Methyl EsterVasoconstrictionPhenylephrineAortic CoarctationMagnetic Resonance SpectroscopyNitric Oxide SynthaseMethylene BlueIndomethacinRats, WistarMyocardial ContractionArteriesGastric FundusPotassium Chloride15-Hydroxy-11 alpha,9 alpha-(epoxymethano)prosta-5,13-dienoic AcidArginineOxadiazolesEnzyme InhibitorsCharybdotoxinCalciumRats, Sprague-DawleyAortic AneurysmPenisCoronary VesselsDiastoleBradykininDogsGuanylate CyclaseElectric StimulationApaminTracheaNitric Oxide DonorsNorepinephrineMuscle TonusGuinea PigsAortographySwineNitric Oxide Synthase Type IIITime FactorsArteriosclerosisPulmonary ArteryNitroglycerinRats, Inbred WKYIsoproterenolBlood PressureEsophageal Sphincter, LowerAortic Aneurysm, ThoracicQuinoxalinesCromakalimEndothelium-Dependent Relaxing FactorsVasoactive Intestinal PeptideEsophagogastric JunctionElasticityGlyburidePotassium Channel BlockersRats, Inbred SHRMolsidomineAneurysm, DissectingEndotheliumomega-N-MethylarginineNuclear Magnetic Resonance, BiomolecularHypertensionAdrenergic beta-AgonistsBasilar ArteryCalcimycinPotassium ChannelsPotassiumKineticsBlood Vessel Prosthesis ImplantationPressureVentricular Function, LeftRenal ArteryManometryGuanethidinePhenoxyacetatesMyocardiumCyclooxygenase InhibitorsHeart