Vasodilator AgentsPapaverineAngina PectorisNitroprussideAngina, UnstableVasodilationAcetylcholineVascular ResistanceAngina Pectoris, VariantAngina, StableMicrovascular AnginaNitroglycerinCoronary VasospasmLudwig's AnginaNitric OxideCoronary VesselsCoronary AngiographyRegional Blood FlowIsosorbide DinitrateMyocardial InfarctionCoronary CirculationForearmEndothelium, VascularHemodynamicsBlood PressureErgonovineCoronary DiseaseVasoconstrictionHydralazineBradykininElectrocardiographyExercise TestMyocardial IschemiaNG-Nitroarginine Methyl EsterEpoprostenolVasoconstrictor AgentsCalcitonin Gene-Related PeptideCoronary Artery DiseaseDipyridamoleDose-Response Relationship, DrugAdenosineHyperemiaMesenteric ArteriesHeart RateVasomotor SystemPulmonary CirculationArginineDogsomega-N-MethylarginineCounterpulsationNitric Oxide SynthaseHypertension, PulmonaryAcetanilidesAngioplasty, Balloon, CoronaryMuscle, Smooth, VascularSplanchnic CirculationFollow-Up StudiesNicorandilCoronary Artery BypassNifedipineChest PainTime FactorsArteriolesProspective StudiesTreatment OutcomeEndothelium-Dependent Relaxing FactorsPlethysmographyAdrenergic beta-AntagonistsDouble-Blind MethodMyocardial RevascularizationMicrocirculationCardiovascular AgentsArteriesAdrenomedullinRenal CirculationCromakalimPulmonary ArteryIndomethacinBlood Flow VelocityPropranololNitroarginineEnzyme InhibitorsRisk FactorsDiltiazemMinoxidilAtherectomy, CoronaryHypertensionBiological FactorsVerapamilMuscle TonusElectrocardiography, AmbulatoryInfusions, Intra-ArterialProstaglandinsBenzopyransHeart15-Hydroxy-11 alpha,9 alpha-(epoxymethano)prosta-5,13-dienoic AcidNorepinephrineBrachial ArteryNitratesPhysical Exertion