EmbolismIntracranial Embolism and ThrombosisMesenteric ArteriesMesenteric Artery, SuperiorThromboembolismMesenteric Artery, InferiorArteriesMesenteric Vascular OcclusionRetinal Artery OcclusionCoronary OcclusionArterial Occlusive DiseasesPulmonary ArteryBalloon OcclusionCerebral ArteriesCeliac ArteryRetinal Vein OcclusionSuperior Mesenteric Artery SyndromePulmonary EmbolismFemoral ArteryRenal ArteryCarotid ArteriesAnticoagulantsCarotid Artery, InternalTreatment OutcomeVasodilationInfarction, Middle Cerebral ArteryBasilar ArteryVasoconstrictionMuscle, Smooth, VascularTime FactorsSplanchnic CirculationEndarterectomyAngiographyEmbolization, TherapeuticIliac ArteryDental OcclusionBrain IschemiaVasodilator AgentsCarotid Artery DiseasesTomography, X-Ray ComputedMesenteric VeinsVertebral ArteryCerebral AngiographyHypertension, PulmonaryVasoconstrictor AgentsEndothelium, VascularBiological FactorsDogsRats, WistarCoronary VesselsRegional Blood FlowSplenic ArteryStentsCerebral InfarctionRats, Sprague-DawleyBlood PressureThrombosisConstrictionCoronary Artery BypassHepatic ArteryRetrospective StudiesVenous ThrombosisFollow-Up StudiesConstriction, PathologicWarfarinIntracranial AneurysmMiddle Cerebral ArteryCollateral CirculationNorepinephrineCerebrovascular CirculationSubclavian ArteryCarotid Artery ThrombosisHemodynamicsIntracranial ThrombosisRadial ArteryDisease Models, AnimalIschemiaFibrinolytic AgentsDose-Response Relationship, DrugPhenylephrineStrokeMammary ArteriesAcetylcholineProspective StudiesRisk FactorsIschemic Attack, TransientGraft Occlusion, VascularPostoperative ComplicationsMagnetic Resonance AngiographyMyographyAneurysmReperfusion InjuryIntracranial EmbolismThrombophlebitisBrachial ArteryCerebral Arterial DiseasesHemorrhageAngioplasty, BalloonCarotid Artery, CommonVascular Patency