CuldoscopyBalloon OcclusionCatheterizationAngioplasty, BalloonEmbolization, TherapeuticCarotid Artery, InternalCollateral CirculationAngioplasty, Balloon, CoronaryCavernous SinusSuperior Sagittal SinusCarotid Artery DiseasesIntracranial AneurysmIntra-Aortic Balloon PumpingStentsTreatment OutcomeIntraoperative CareCerebral AngiographyGastric BalloonOximesHemodynamicsCoronary CirculationOrganotechnetium CompoundsTechnetium Tc 99m ExametazimeCoronary OcclusionIntracranial EmbolismMyocardial StunningMyocardial IschemiaSwineTime FactorsCoronary VesselsRetinal Vein OcclusionArteriovenous FistulaCoronary AngiographyArterial Occlusive DiseasesCerebrovascular CirculationRetinal Artery OcclusionIntraoperative ComplicationsCardiac CatheterizationTomography, Emission-Computed, Single-PhotonVena Cava, InferiorFollow-Up StudiesDogsDisease Models, AnimalCoronary DiseaseElectrocardiographyMyocardial InfarctionMyocardial ReperfusionNeurologic ExaminationBlood Flow VelocityBalloon ValvuloplastyCarotid StenosisDental OcclusionTomography, X-Ray ComputedVentricular Function, LeftBlood PressureContrast MediaPreoperative CareAngioplasty, Balloon, Laser-AssistedProspective StudiesConstriction, PathologicGraft Occlusion, VascularInfarction, Middle Cerebral ArteryBrain IschemiaCarotid Artery Injuries