Mesenteric ArteriesMesenteric Artery, SuperiorPulmonary EmbolismMesenteric Artery, InferiorArteriesEmbolismEmbolism, FatMesenteric Vascular OcclusionCeliac ArteryPulmonary ArterySuperior Mesenteric Artery SyndromeEmbolism, ParadoxicalIntracranial EmbolismRenal ArteryCerebral ArteriesIntracranial Embolism and ThrombosisCarotid ArteriesVasodilationMuscle, Smooth, VascularFemoral ArteryVasoconstrictionSplanchnic CirculationEmbolism, Amniotic FluidBasilar ArteryMesenteric VeinsBiological FactorsVasoconstrictor AgentsVasodilator AgentsSplenic ArteryAngiographyTomography, X-Ray ComputedIliac ArteryEndothelium, VascularVertebral ArteryCoronary Artery BypassNorepinephrineHepatic ArteryEmbolism, CholesterolCarotid Artery, InternalPhenylephrineMyographyRadial ArteryRats, WistarMammary ArteriesAcetylcholineTreatment OutcomeSubclavian ArteryDuodenostomyCarotid Artery DiseasesTime FactorsRats, Sprague-DawleyEmbolectomyRats, Inbred WKYCoronary VesselsBlood PressureVenous ThrombosisMuscle RelaxationMuscle ContractionDose-Response Relationship, DrugVena Cava, SuperiorNitric OxideBrachial ArteryAneurysmSuperior ColliculiAnticoagulantsEndothelium-Dependent Relaxing FactorsCarotid Artery, CommonArterial Occlusive DiseasesVentilation-Perfusion RatioRats, Inbred SHRRegional Blood FlowDogsRenal Artery ObstructionConstriction, PathologicOphthalmic ArteryStentsUltrasonography, DopplerPotassium ChlorideCharybdotoxin15-Hydroxy-11 alpha,9 alpha-(epoxymethano)prosta-5,13-dienoic AcidRetrospective StudiesMiddle Cerebral ArteryNG-Nitroarginine Methyl EsterRabbitsProspective StudiesFollow-Up StudiesUmbilical ArteriesAorta, ThoracicThoracic ArteriesVena Cava FiltersPopliteal ArteryPostoperative ComplicationsTemporal ArteriesTomography, Spiral ComputedAcute DiseaseAortaThromboembolismRisk FactorsThrombosisIndomethacin