Intracranial AneurysmBasilar ArteryPetrous BoneCeliac ArteryAneurysmAneurysm, InfectedArteriesVertebrobasilar InsufficiencyAortic AneurysmCerebral AngiographyAortic Aneurysm, ThoracicHeart AneurysmSubarachnoid HemorrhageVertebral ArteryAneurysm, DissectingCerebral ArteriesEmbolization, TherapeuticIliac AneurysmTomography, X-Ray ComputedCoronary AneurysmPulmonary ArteryBlood Vessel Prosthesis ImplantationCarotid ArteriesRenal ArteryAngiography, Digital SubtractionAneurysm, FalseBrain Stem InfarctionsCarotid Artery, InternalFemoral ArteryVasospasm, IntracranialAortic RuptureIliac ArteryTreatment OutcomeBlood Vessel ProsthesisMesenteric ArteriesEndovascular ProceduresAorta, AbdominalStentsCarotid Artery DiseasesVasodilationSplenic ArteryAortographyAngiographyVascular Surgical ProceduresSubclavian ArteryVasoconstrictionArterial Occlusive DiseasesMuscle, Smooth, VascularCoronary Artery BypassCircle of WillisMesenteric Artery, SuperiorCerebrovascular CirculationRadial ArteryDogsMiddle Cerebral ArteryFollow-Up StudiesMammary ArteriesSurgical InstrumentsCarotid Artery, CommonRetrospective StudiesVasodilator AgentsTime FactorsHepatic ArteryMagnetic Resonance AngiographyPosterior Cerebral ArterySerotoninDilatation, PathologicPostoperative ComplicationsAnterior Cerebral ArteryBrachial ArteryOphthalmic ArteryPopliteal ArteryCoronary VesselsRabbitsPapaverineMuscle ContractionPotassium ChlorideIntracranial Embolism and ThrombosisVasoconstrictor AgentsIntracranial ThrombosisProsthesis DesignTemporal ArteriesPicolinesIschemic Attack, TransientEndothelium, VascularMechanical ThrombolysisUltrasonography, Doppler, TranscranialNeurosurgical ProceduresSumatriptanIntracranial ArteriosclerosisVertebral Artery DissectionAcetylcholineRenal Artery ObstructionAneurysm, RupturedBronchial ArteriesThoracic ArteriesAngioplastyRisk FactorsUlnar ArteryCerebral Infarction