Myocardial IschemiaIschemiaBrain IschemiaMyocardial Reperfusion InjuryMyocardiumCoronary CirculationCoronary DiseaseElectrocardiographyReperfusion InjuryExercise TestMyocardial ReperfusionMyocardial InfarctionHeartAngina PectorisCardiotonic AgentsHemodynamicsIschemic Preconditioning, MyocardialDogsTime FactorsCoronary VesselsDisease Models, AnimalElectrocardiography, AmbulatoryHeart RateArrhythmias, CardiacCoronary AngiographyTomography, Emission-Computed, Single-PhotonMyocardial ContractionRats, Sprague-DawleyReperfusionMyocardial Perfusion ImagingVentricular Function, LeftCreatine KinaseIschemic PreconditioningIschemic Attack, TransientBlood PressureRats, WistarPerfusionWarm IschemiaMyocardial StunningDipyridamoleAdenosineThallium RadioisotopesCollateral CirculationCoronary Artery DiseaseDobutamineSwineVasodilator AgentsMyocytes, CardiacIntraoperative ComplicationsEchocardiographyHeart VentriclesRabbitsChest PainCold IschemiaEchocardiography, StressTroponin IAnesthesiaVentricular FibrillationIschemic PostconditioningGerbillinaeNitroglycerinSpinal Cord IschemiaAcute DiseaseTroponin TMitochondria, HeartLactic AcidCoronary StenosisRandom AllocationCardiovascular AgentsAngina, UnstableProspective StudiesSwine, MiniaturePredictive Value of TestsConstrictionNecrosisLactatesCatsHeart Function TestsAngina Pectoris, VariantBiological MarkersNeuroprotective AgentsCoronary Vessel AnomaliesVentricular Dysfunction, LeftL-Lactate DehydrogenaseAdrenergic beta-AntagonistsOxygen ConsumptionInfarction, Middle Cerebral ArteryAdenosine TriphosphatePeroxidaseMice, Inbred C57BLCoronary VasospasmCoronary Artery BypassApoptosisMicrovascular AnginaErgonovinePericardiumRisk FactorsSensitivity and SpecificityNitric OxideCerebrovascular Circulation