Brachial ArteryChoroid PlexusBrachial PlexusArteriesVasodilationForearmRegional Blood FlowEndothelium, VascularMyenteric PlexusNitroglycerinHyperemiaCarotid ArteriesRadial ArterySubmucous PlexusPulmonary ArteryFemoral ArteryChoroid Plexus NeoplasmsCerebral ArteriesBlood Flow VelocityRenal ArteryVasodilator AgentsCeliac PlexusCervical PlexusLumbosacral PlexusMesenteric ArteriesAxillary ArteryCarotid Artery, CommonBasilar ArteryUlnar ArterySubclavian ArteryUltrasonography, DopplerBlood PressureIliac ArteryUltrasonography, Doppler, PulsedVertebral ArteryCoronary Artery BypassMammary ArteriesArmCarotid Artery DiseasesCarotid Artery, InternalCompliancePlethysmographyCoronary VesselsPulsatile FlowPapilloma, Choroid PlexusSplenic ArteryVasoconstrictionCatheterization, PeripheralAngiographyHepatic Arteryomega-N-MethylarginineTime FactorsNitroprussideCeliac ArteryCross-Over StudiesDilatation, PathologicPopliteal ArteryInfusions, Intra-ArterialArteriovenous Shunt, SurgicalTreatment OutcomeNitric OxideHypogastric PlexusOphthalmic ArteryArterial Occlusive DiseasesMesenteric Artery, SuperiorVeinsVascular ResistanceHemodynamicsCoronary AngiographyRisk FactorsVascular DiseasesAcetylcholineUmbilical ArteriesMiddle Cerebral ArteryRenal Artery ObstructionMuscle, Smooth, VascularThoracic ArteriesCoronary DiseaseProspective StudiesTemporal ArteriesAneurysmLaser-Doppler FlowmetryDouble-Blind MethodBronchial ArteriesAtherosclerosisVascular PatencyCrutchesAneurysm, FalseTunica MediaHeart RateReference ValuesExerciseInjections, Intra-ArterialBrachial Plexus NeuritisPulseVasoconstrictor AgentsAdministration, SublingualVasomotor SystemFollow-Up StudiesCardiovascular Diseases