Collateral CirculationCoronary CirculationCoronary VesselsDogsCoronary AngiographyCoronary Artery DiseaseCoronary DiseaseAngioplasty, Balloon, CoronaryCoronary OcclusionCoronary StenosisNeovascularization, PhysiologicHindlimbMyocardial IschemiaIschemiaBalloon OcclusionMicrospheresLigationBlood Flow VelocityCollateral LigamentsHemodynamicsFemoral ArteryBlood VesselsMyocardial InfarctionCardiac CatheterizationCoronary Artery BypassMoyamoya DiseaseAngina PectorisConstriction, PathologicRegional Blood FlowTime FactorsDisease Models, AnimalArteriolosclerosisVascular ResistanceVascular Endothelial Growth Factor AElectrocardiographyAngiographyBlood PressureMedial Collateral Ligament, KneeArterial Occlusive DiseasesAngiostatinsHyperemiaEndothelium, VascularDipyridamoleCoronary VasospasmNitroglycerinVasodilator AgentsCineangiographyProspective StudiesCoronary AneurysmCoronary ThrombosisRisk FactorsAdenosineHeartArteriesVasodilationCapillariesEndothelial Growth FactorsVena Cava, SuperiorLaser-Doppler FlowmetryCoronary RestenosisVascular Endothelial Growth FactorsTreatment OutcomeLymphokinesPerfusionMyocardiumFollow-Up StudiesTomography, X-Ray ComputedVasoconstrictionSwineMagnetic Resonance AngiographyMesenteric VeinsInjections, Intra-ArterialIliac ArteryCerebral ArteriesMuscle, Smooth, VascularPercutaneous Coronary Intervention