ArteriesPulmonary ArteryCarotid ArteriesCerebral ArteriesRenal ArteryFemoral ArteryMesenteric ArteriesBasilar ArteryIliac ArteryVertebral ArteryCoronary Artery BypassRadial ArteryMammary ArteriesCarotid Artery, InternalSubclavian ArteryCarotid Artery DiseasesSplenic ArteryBrachial ArteryHepatic ArteryCarotid Artery, CommonCoronary VesselsCeliac ArteryOphthalmic ArteryMesenteric Artery, SuperiorUmbilical ArteriesMiddle Cerebral ArteryRenal Artery ObstructionThoracic ArteriesTemporal ArteriesBronchial ArteriesPopliteal ArteryUlnar ArteryUterine ArteryCoronary AngiographyCarotid Artery, ExternalVasodilationCarotid Artery InjuriesMuscle, Smooth, VascularArterial Occlusive DiseasesVasoconstrictionAngiographyCoronary DiseaseTime FactorsTreatment OutcomeEndothelium, VascularTomography, X-Ray ComputedInfarction, Middle Cerebral ArteryAxillary ArteryRetinal Artery OcclusionStentsCarotid Artery ThrombosisVasodilator AgentsMeningeal ArteriesAneurysmRegional Blood FlowCarotid StenosisCerebral AngiographyBlood PressureMagnetic Resonance AngiographyCoronary CirculationDogsMaxillary ArteryVasoconstrictor AgentsConstriction, PathologicFollow-Up StudiesAngioplasty, BalloonCarotid Artery, Internal, DissectionHemodynamicsProspective StudiesCoronary Artery Bypass, Off-PumpInternal Mammary-Coronary Artery AnastomosisMyocardial InfarctionCoronary StenosisVascular PatencyVertebral Artery DissectionRisk FactorsEmbolization, TherapeuticRetrospective StudiesUltrasonography, DopplerMesenteric Artery, InferiorCerebrovascular CirculationSwineAngiography, Digital SubtractionArteriosclerosisLigationPredictive Value of TestsRabbitsIntracranial AneurysmAneurysm, FalsePostoperative ComplicationsCalcinosisAcetylcholineUltrasonography, Doppler, ColorNitric OxideRats, Sprague-DawleyCatheterizationPulsatile FlowTransposition of Great VesselsVertebrobasilar InsufficiencyDose-Response Relationship, Drug