Vasospasm, IntracranialVasoconstrictionSubarachnoid HemorrhageCoronary VasospasmBasilar ArteryVasoconstrictor AgentsIschemic Attack, TransientCerebral AngiographyRegional Blood FlowVascular ResistanceVasodilator AgentsCerebral ArteriesEndothelin-1Pulmonary CirculationPapaverineCisterna MagnaVasodilationIntracranial AneurysmBlood PressureDogsAnoxiaMuscle, Smooth, VascularArteriolesSpasmNorepinephrinePulmonary ArteryAneurysm, RupturedPhenylephrineHemodynamicsReceptors, EndothelinVasomotor SystemShiveringCerebrovascular CirculationForearmSkin TemperatureRenal CirculationMesenteric ArteriesNimodipineInfusions, Intra-ArterialNitric OxideUltrasonography, Doppler, TranscranialEndothelinsReceptor, Endothelin AErgonovineBody Temperature RegulationPerfusionDose-Response Relationship, DrugArteries15-Hydroxy-11 alpha,9 alpha-(epoxymethano)prosta-5,13-dienoic AcidAdrenergic alpha-1 Receptor AgonistsAdrenergic alpha-AgonistsHeadache Disorders, PrimaryInjections, Intra-ArterialNicardipineRats, Sprague-DawleySympathetic Nervous SystemCoronary VesselsBlood Flow VelocityAdrenergic alpha-AntagonistsEndothelium, VascularAngiotensin IIMicrocirculationReceptor, Endothelin BNG-Nitroarginine Methyl EsterPotassium ChlorideReceptors, Adrenergic, alpharho-Associated KinasesLaser-Doppler FlowmetryAngina Pectoris, VariantCalcium Channel BlockersSerotoninMethoxamineAcetylcholineEnzyme InhibitorsRabbitsHeart RateTyraminePeptides, CyclicMiddle Cerebral ArteryAngiography, Digital SubtractionThromboxane A2PregnatrienesNitric Oxide SynthaseSplanchnic CirculationDisease Models, AnimalViper VenomsCold TemperaturePrazosinDioxanesOxygen1-(5-Isoquinolinesulfonyl)-2-MethylpiperazineNitroprussidePlethysmographyRats, WistarMuscle ContractionMeclofenamic AcidNitroglycerinRaynaud DiseaseTime FactorsKidney