HyperemiaRegional Blood FlowForearmVasodilationCoronary CirculationBrachial ArteryAdenosineLaser-Doppler FlowmetryBlood Flow VelocityVasodilator AgentsMicrocirculationPlethysmographyEndothelium, VascularAnesthetics, LocalCerebrovascular CirculationBlood PressureVascular ResistanceDogsAnesthesia, LocalNitric OxideFractional Flow Reserve, MyocardialCoronary VesselsTime FactorsHemodynamicsConstrictionDipyridamoleMuscle, SkeletalTheophyllineNG-Nitroarginine Methyl EsterSkin TemperatureSkinLegKetorolacProstaglandinsFingersomega-N-MethylarginineNitric Oxide SynthaseBlood CirculationBlood VolumePurinergic P1 Receptor Antagonists