Mesenteric ArteriesMesenteric Artery, SuperiorPulmonary EmbolismIschemiaMyocardial IschemiaMesenteric Artery, InferiorEmbolismArteriesEmbolism, FatBrain IschemiaMesenteric Vascular OcclusionReperfusion InjuryCeliac ArteryPulmonary ArteryAcute DiseaseSuperior Mesenteric Artery SyndromeEmbolism, ParadoxicalIntracranial EmbolismDogsTime FactorsRenal ArteryMyocardial Reperfusion InjuryCerebral ArteriesEmbolectomyRats, WistarAneurysmIntracranial Embolism and ThrombosisFemoral ArteryCarotid ArteriesVasodilationMuscle, Smooth, VascularRats, Sprague-DawleyVasoconstrictionSplanchnic CirculationTomography, X-Ray ComputedArterial Occlusive DiseasesDisease Models, AnimalPopliteal ArteryBasilar ArteryEmbolism, Amniotic FluidMesenteric VeinsCoronary CirculationIschemic Attack, TransientVasodilator AgentsMyocardiumCoronary VesselsAngiographyCoronary DiseaseBiological FactorsHemodynamicsVasoconstrictor AgentsIliac ArteryElectrocardiographyTreatment OutcomeBlood PressureEndothelium, VascularSplenic ArteryRegional Blood FlowHindlimbCerebral InfarctionMyocardial InfarctionCoronary Artery BypassHeartNorepinephrineVertebral ArteryHepatic ArteryRabbitsVentricular FibrillationLegCerebrovascular CirculationArrhythmias, CardiacCarotid Artery, InternalVascular PatencyEmbolism, CholesterolPhenylephrineRadial ArteryRetrospective StudiesSwineMyographyAmputationSubclavian ArteryAcetylcholineMyocardial StunningMammary ArteriesMyocardial ReperfusionFollow-Up StudiesDose-Response Relationship, DrugNitric OxideHeart VentriclesCarotid Artery DiseasesDuodenostomyThrombolytic TherapyRats, Inbred WKYMuscle ContractionReperfusionBrachial ArteryBrainVenous ThrombosisInfarction, Middle Cerebral ArteryMuscle Relaxation