NiacinamideVasodilator AgentsGlyburideCromakalimPinacidilBenzopyransAnti-Arrhythmia AgentsPotassium ChannelsIsosorbide DinitrateNitroglycerinKATP ChannelsImino PyranosesDecanoic AcidsHydroxy AcidsMethylene BlueGuanidinesPyrrolesVentricular Premature ComplexesAngina PectorisIschemic Preconditioning, MyocardialPicolinesRectovaginal FistulaAdenosine TriphosphateAminophyllineDiltiazemAntihypertensive AgentsMuscle RelaxationDogsOral UlcerMyocardial IschemiaMyocardial InfarctionDiazoxideCoronary VesselsRomano-Ward SyndromeFissure in AnoMyocardial ReperfusionVerapamilAdministration, IntravenousMyocardial Reperfusion InjuryCardiac Complexes, PrematureElectrocardiographySulfonylurea CompoundsCardiotonic AgentsHemodynamicsNicardipineCoronary VasospasmAngina, StableInjections, IntravenousCarbonyl Cyanide m-Chlorophenyl HydrazoneTetraethylammonium CompoundsInfusions, IntravenousDiverticulum, ColonDose-Response Relationship, DrugRubidiumOxadiazoles2-ChloroadenosineNifedipineSulfonylurea ReceptorsBlood PressureNitroprussideMembrane PotentialsAngioplasty, Balloon, CoronaryCoronary CirculationRubidium RadioisotopesMitochondria, HeartArrhythmias, CardiacPotassium Channels, Inwardly RectifyingCalcium Channel BlockersGuinea PigsNitric Oxide DonorsPyransRadionuclide VentriculographyHeart VentriclesMethacholine Compounds1-DeoxynojirimycinCyclic GMPIsoproterenolMesenteric ArteriesPulmonary Wedge PressureImmersionRats, WistarMyocardiumHeart RateAdenoma, Islet CellPotassium ChlorideGTP CyclohydrolaseMonocrotalineHypoglycemic AgentsRats, Sprague-DawleyMuscle, Smooth, VascularPyridinesPurkinje FibersElectrophysiologyDrug Administration RoutesHydroxybenzoatesSarcolemmaPotassium Channel BlockersDouble-Blind MethodPremedicationAdministration, Oral