Collateral CirculationCoronary CirculationCoronary Artery DiseaseCoronary VesselsCoronary AngiographyCoronary DiseaseCoronary Artery BypassCoronary StenosisAngioplasty, Balloon, CoronaryRisk FactorsCoronary OcclusionMyocardial InfarctionMyocardial IschemiaAngina PectorisArteriesDogsElectrocardiographyProspective StudiesCardiac CatheterizationTime FactorsHemodynamicsTreatment OutcomeBalloon OcclusionFollow-Up StudiesBlood Flow VelocityCoronary VasospasmConstriction, PathologicPredictive Value of TestsDipyridamoleExercise TestCoronary AneurysmTomography, X-Ray ComputedVasodilator AgentsBlood PressureAngiographyCoronary ThrombosisSeverity of Illness IndexHeartRetrospective StudiesCalcinosisMyocardial RevascularizationArterial Occlusive DiseasesCoronary RestenosisRisk AssessmentStentsFemoral ArteryNitroglycerinVasodilationCineangiographyEndothelium, VascularCarotid ArteriesTomography, Emission-Computed, Single-PhotonCarotid Artery DiseasesMagnetic Resonance AngiographyPercutaneous Coronary InterventionCerebral ArteriesUltrasonography, InterventionalNeovascularization, PhysiologicCoronary Artery Bypass, Off-PumpBiological MarkersRegional Blood FlowHyperemiaMyocardial Perfusion ImagingCase-Control StudiesAdenosineSensitivity and SpecificityCircle of WillisThallium RadioisotopesCollateral LigamentsMyocardiumAngina, UnstableEchocardiographyPulmonary ArteryCarotid Artery, InternalPrognosisCerebrovascular CirculationDisease Models, AnimalChest PainMammary ArteriesCerebral AngiographyVascular ResistanceDobutamineLigationSwineMicrospheresMultivariate AnalysisVasoconstrictionPlatelet Aggregation InhibitorsKidney CalicesLogistic ModelsIschemiaCohort StudiesTechnetium Tc 99m SestamibiCarotid StenosisChi-Square DistributionEchocardiography, StressCardiovascular AgentsCeliac ArteryStrokeCardiovascular Diseases