Vasospasm, IntracranialSubarachnoid HemorrhageCoronary VasospasmConstrictionBasilar ArteryVasoconstrictionConstriction, PathologicIschemic Attack, TransientCerebral AngiographyCisterna MagnaCerebral ArteriesPapaverineSpasmIntracranial AneurysmArteriolesAneurysm, RupturedVasoconstrictor AgentsUltrasonography, Doppler, TranscranialErgonovineCerebrovascular CirculationNimodipineVasodilator AgentsDogsMuscle, Smooth, VascularDuctus ArteriosusNicardipineVasodilationMiddle Cerebral ArteryDisease Models, AnimalAngina Pectoris, VariantInfusions, Intra-ArterialAngiography, Digital SubtractionPregnatrienesEndothelin-1Reflex, PupillaryPia MaterBlood Flow VelocityBronchoconstrictionRats, Sprague-DawleyAmniotic Band Syndrome15-Hydroxy-11 alpha,9 alpha-(epoxymethano)prosta-5,13-dienoic AcidCoronary VesselsPupilInjections, Intra-ArterialSerotoninTomography, X-Ray ComputedArteriesMicrocirculationVasomotor SystemBlood Pressurerho-Associated KinasesPotassium ChlorideRabbits1-(5-Isoquinolinesulfonyl)-2-MethylpiperazineCalcium Channel BlockersTime FactorsRegional Blood FlowSubarachnoid SpaceMuscle TonusVascular ResistanceDose-Response Relationship, DrugRupture, SpontaneousPericarditis, ConstrictiveCardiomegalyPhenylephrineDioxanesEndothelium, VascularMuscle ContractionAcetylcholinePerfusion ImagingHemodynamicsNitric OxideVentriculostomyNorepinephrineTreatment OutcomeRaynaud DiseaseMesenteric ArteriesEnzyme InhibitorsThromboxane A2Receptors, EndothelinHyperesthesiaPressureEndothelinsThromboxane-A SynthaseBrain IschemiaBrainPerfusionSciatic NeuropathyPosterior Cerebral ArteryFormamidesActomyosinVascular DiseasesReceptor, Endothelin ANitroglycerinDiltiazemRats, WistarAngiographyNeuralgiaIofetamineOxyhemoglobins