Coronary VasospasmNitroglycerinCoronary VesselsVasospasm, IntracranialAngina Pectoris, VariantCoronary AngiographyErgonovineCoronary Artery DiseaseCoronary CirculationAngioplasty, Balloon, CoronaryVasodilator AgentsIsosorbide DinitrateElectrocardiographyCoronary StenosisCoronary Artery BypassSubarachnoid HemorrhageCoronary DiseaseDiltiazemMyocardial InfarctionVasoconstrictionAcetylcholineAngina PectorisCardiac CatheterizationCoronary AneurysmCalcium Channel BlockersNitratesCoronary Thrombosisrho-Associated KinasesCoronary RestenosisVasodilationCoronary OcclusionDogsBasilar ArteryPercutaneous Coronary InterventionTreatment OutcomeRisk FactorsCoronary Care UnitsPapaverineSpasmTime FactorsHemodynamicsMyocardial IschemiaDrug ToleranceProspective StudiesUltrasonography, InterventionalBlood Flow VelocityStentsFollow-Up StudiesBlood PressureEndothelium, VascularIschemic Attack, TransientPredictive Value of TestsAdministration, CutaneousVascular ResistanceTomography, X-Ray ComputedAngina, UnstableCerebral AngiographyNicorandilCalcinosisCoronary Artery Bypass, Off-PumpCollateral Circulation