Coronary Vessel AnomaliesCoronary VesselsArrhythmias, CardiacCoronary AngiographyCoronary Artery DiseaseCoronary CirculationAngioplasty, Balloon, CoronaryCoronary StenosisPericardiumCoronary DiseaseCoronary Artery BypassElectrocardiographyArrhythmia, SinusHeartMyocardial InfarctionBlood VesselsDogsMyocardiumCoronary RestenosisCoronary VasospasmEbstein AnomalyMyocardial IschemiaTime FactorsTreatment OutcomeCoronary AneurysmRisk FactorsTachycardia, VentricularCoronary ThrombosisStentsProspective StudiesEndothelium, VascularNitroglycerinFollow-Up StudiesVasodilator AgentsAnti-Arrhythmia AgentsVasodilationPredictive Value of TestsVascular ResistanceVasa VasorumVentricular FibrillationModels, CardiovascularCoronary OcclusionHemodynamicsUltrasonography, InterventionalHeart VentriclesTomography, X-Ray ComputedSwineAdenosinePercutaneous Coronary InterventionRetrospective StudiesCalcinosisLymphatic VesselsBlood Flow VelocityVentricular Premature ComplexesBlood PressureHeart RateCoronary Care UnitsMagnetic Resonance AngiographyHeart Conduction SystemAbnormalities, MultipleDeath, Sudden, CardiacArteriesSensitivity and SpecificityVasoconstrictionTachycardiaElectrocardiography, AmbulatoryAcetylcholineNeovascularization, PhysiologicExercise TestRetinal VesselsCongenital AbnormalitiesSeverity of Illness IndexReproducibility of ResultsPerfusionQuailCoturnixCardiac Complexes, PrematureAtrial FibrillationMyocardial ContractionNitric OxideMuscle, Smooth, VascularBiological MarkersContrast MediaSyndromeEchocardiographyFeasibility StudiesVeinsRisk AssessmentCardiac CatheterizationLong QT SyndromePelger-Huet AnomalyCardiac Pacing, ArtificialTachycardia, SupraventricularRegional Blood FlowCatheter AblationHeart Defects, CongenitalMyocardial RevascularizationTunica MediaTunica IntimaElectrophysiologic Techniques, Cardiac