Collateral CirculationCoronary CirculationCollateral LigamentsCircle of WillisArterial Occlusive DiseasesKidney CalicesCerebrovascular CirculationCoronary AngiographyCoronary OcclusionAngiographyCerebral AngiographyLiver CirculationHypertension, PortalIntervention StudiesAngina PectorisIschemiaMedial Collateral Ligament, KneeConstriction, PathologicLigationBalloon OcclusionCoronary VesselsAngioplasty, Balloon, CoronaryCoronary DiseaseRegional Blood FlowBlood Flow VelocityMagnetic Resonance AngiographyCineangiographyTreatment OutcomeCarotid Artery, InternalCeliac ArteryBlood CirculationCerebral ArteriesTime FactorsCoronary StenosisMyocardial InfarctionDoppler EffectCerebral Arterial DiseasesFemoral ArteryHindlimbHemodynamicsCarotid Artery, ExternalMoyamoya DiseaseNeovascularization, PhysiologicTomography, X-Ray ComputedElectrocardiographyAngiography, Digital SubtractionMyocardial IschemiaCardiac CatheterizationCarotid StenosisBrain IschemiaPhlebographyInfarction, Middle Cerebral ArteryFollow-Up StudiesProspective StudiesDogsEmbolization, TherapeuticArteriesCoronary Artery DiseaseCerebral InfarctionExtracorporeal CirculationPulmonary CirculationBlood PressureStrokeRetrospective StudiesCarotid Artery DiseasesDisease Models, AnimalCarotid ArteriesSeverity of Illness IndexMagnetic Resonance ImagingHealth PromotionBrainEarly Medical Intervention