EmbolismIntracranial Embolism and ThrombosisMesenteric ArteriesMesenteric Artery, SuperiorMesenteric Artery, InferiorArteriesThrombosisMesenteric Vascular OcclusionCeliac ArteryPulmonary ArterySuperior Mesenteric Artery SyndromeCerebral ArteriesPulmonary EmbolismFemoral ArteryCarotid ArteriesRenal ArteryArterial Occlusive DiseasesVasodilationMuscle, Smooth, VascularBasilar ArteryVasoconstrictionIntracranial EmbolismSplanchnic CirculationCarotid Artery ThrombosisThrombectomyCarotid Artery, InternalTomography, X-Ray ComputedIliac ArteryEmbolism, AirAngiographyRetinal Artery OcclusionCoronary OcclusionBalloon OcclusionTreatment OutcomeCoronary ThrombosisMesenteric VeinsTime FactorsCarotid Artery DiseasesEndothelium, VascularVasodilator AgentsEmbolectomyBiological FactorsVasoconstrictor AgentsVertebral ArteryDogsCoronary VesselsSplenic ArteryCoronary Artery BypassRats, WistarRetinal Vein OcclusionInfarction, Middle Cerebral ArteryHepatic ArteryMiddle Cerebral ArteryVenous ThrombosisNorepinephrineCerebral AngiographyRats, Sprague-DawleyRadial ArteryEmbolization, TherapeuticRegional Blood FlowBlood PressureSubclavian ArteryAneurysmPhenylephrineDisease Models, AnimalMammary ArteriesAcetylcholineThrombophlebitisMyographyConstriction, PathologicCerebral InfarctionStentsVena Cava, SuperiorBrain IschemiaAnticoagulantsEchocardiography, TransesophagealCarotid Artery, CommonCoronary AngiographyVena Cava, InferiorDose-Response Relationship, DrugThromboembolismCarotid StenosisDuodenostomyHeart DiseasesFibrinolytic AgentsIschemiaUltrasonography, Doppler, TranscranialRabbitsRetrospective StudiesNitric OxideRats, Inbred WKYCatheterizationFibrinBrachial ArteryOphthalmic ArteryFollow-Up StudiesMuscle ContractionMuscle RelaxationMagnetic Resonance AngiographyMyocardial Infarction