Coronary StenosisCoronary VesselsCoronary AngiographyCoronary CirculationCoronary Artery DiseaseCoronary DiseaseAngioplasty, Balloon, CoronaryCarotid StenosisFractional Flow Reserve, MyocardialAortic Valve StenosisConstriction, PathologicCoronary Artery BypassCoronary VasospasmCzechoslovakiaSpinal StenosisDogsCoronary OcclusionMyocardial InfarctionTracheal StenosisMyocardial IschemiaStentsHemodynamicsBlood Flow VelocityUltrasonography, InterventionalTomography, X-Ray ComputedHyperemiaTreatment OutcomeSeverity of Illness IndexPredictive Value of TestsFollow-Up StudiesCoronary AneurysmCoronary RestenosisCollateral CirculationCardiac CatheterizationCoronary ThrombosisSensitivity and SpecificityPyloric StenosisProspective StudiesUSSRMitral Valve StenosisPulmonary Valve StenosisRisk FactorsEchocardiographyElectrocardiographyArterial Occlusive DiseasesDobutamineTime FactorsDipyridamoleCalcinosisAdenosineAngina Pectoris, VariantTomography, Spiral ComputedThallium RadioisotopesMagnetic Resonance AngiographyExercise TestTomography, Emission-Computed, Single-PhotonPercutaneous Coronary InterventionBalloon OcclusionAngina PectorisMyocardial StunningBlood PressureAngiographyVasodilator AgentsChest PainRetrospective StudiesMyocardial ContractionRetinal Artery OcclusionMyocardial RevascularizationHeartMyocardial Perfusion ImagingAngina, UnstableContrast MediaRetinal Vein OcclusionCarotid Artery, InternalSwineEchocardiography, StressMyocardiumGraft Occlusion, VascularMucocutaneous Lymph Node SyndromeRegional Blood FlowConstrictionMyocardial ReperfusionReproducibility of ResultsNitroglycerinAngioplasty, BalloonEndocardiumObserver VariationRecurrenceCineangiographyPericardiumModels, CardiovascularFeasibility StudiesMicrocirculationRenal Artery ObstructionVascular ResistanceVentricular Function, LeftMultidetector Computed TomographyOrganotechnetium CompoundsVasodilationRisk Assessment