Collateral CirculationCoronary CirculationCollateral LigamentsCircle of WillisKidney CalicesArterial Occlusive DiseasesCerebrovascular CirculationCoronary AngiographyCerebral AngiographyAngiographyCoronary OcclusionLiver CirculationHypertension, PortalMedial Collateral Ligament, KneeAngina PectorisIschemiaLigationConstriction, PathologicBalloon OcclusionCoronary VesselsRegional Blood FlowCoronary DiseaseBlood Flow VelocityMagnetic Resonance AngiographyCineangiographyCarotid Artery, InternalCeliac ArteryBlood CirculationCerebral ArteriesAngioplasty, Balloon, CoronaryDoppler EffectCerebral Arterial DiseasesCoronary StenosisHindlimbFemoral ArteryHemodynamicsMoyamoya DiseaseCarotid Artery, ExternalMyocardial InfarctionNeovascularization, PhysiologicAngiography, Digital SubtractionCarotid StenosisTomography, X-Ray ComputedBrain IschemiaMyocardial IschemiaElectrocardiographyTime FactorsInfarction, Middle Cerebral ArteryPhlebographyCardiac CatheterizationDogsEmbolization, TherapeuticArteriesTreatment OutcomeCerebral InfarctionPulmonary CirculationExtracorporeal CirculationCoronary Artery DiseaseBlood PressureCarotid Artery DiseasesProspective StudiesDisease Models, AnimalStrokeCarotid ArteriesFollow-Up StudiesMagnetic Resonance ImagingBrainRetrospective StudiesSeverity of Illness Index