Collateral CirculationHypertensionHypertension, PulmonaryHypertension, PortalCoronary CirculationCollateral LigamentsCircle of WillisCerebrovascular CirculationBlood PressureArterial Occlusive DiseasesKidney CalicesAngiographyCoronary AngiographyCerebral AngiographyLiver CirculationCoronary OcclusionHypertension, RenalLigationIschemiaAngina PectorisConstriction, PathologicRegional Blood FlowMedial Collateral Ligament, KneeBalloon OcclusionCoronary VesselsCoronary DiseaseBlood Flow VelocityHemodynamicsMagnetic Resonance AngiographyCineangiographyBlood CirculationCarotid Artery, InternalCerebral ArteriesCeliac ArteryHypertension, RenovascularAntihypertensive AgentsAngioplasty, Balloon, CoronaryDoppler EffectTime FactorsCerebral Arterial DiseasesCoronary StenosisFemoral ArteryMyocardial InfarctionHindlimbCardiac CatheterizationElectrocardiographyMoyamoya DiseaseTomography, X-Ray ComputedNeovascularization, PhysiologicCarotid Artery, ExternalHypertension, MalignantAngiography, Digital SubtractionPulmonary CirculationBrain IschemiaMyocardial IschemiaTreatment OutcomeCarotid StenosisArteriesPhlebographyInfarction, Middle Cerebral ArteryDogsProspective StudiesDisease Models, AnimalFollow-Up StudiesEmbolization, TherapeuticCerebral InfarctionPulmonary ArteryStrokeExtracorporeal CirculationCoronary Artery DiseaseRetrospective StudiesCarotid ArteriesVascular ResistanceCarotid Artery DiseasesHypertension, Pregnancy-InducedSeverity of Illness IndexMagnetic Resonance ImagingRisk FactorsBrainOcular HypertensionRats, Inbred SHRReninKidneyBlood Pressure DeterminationRats, Sprague-DawleyVasodilator AgentsIntracranial HypertensionRats, Inbred WKY