AdenosineReceptors, Purinergic P1Receptor, Adenosine A2AReceptor, Adenosine A3Receptor, Adenosine A1Purinergic P1 Receptor AgonistsPurinergic P1 Receptor AntagonistsReceptor, Adenosine A2BXanthinesAdenosine A2 Receptor AgonistsAdenosine-5'-(N-ethylcarboxamide)Adenosine A2 Receptor AntagonistsReceptors, Adenosine A2Adenosine A1 Receptor AgonistsReceptors, PurinergicAdenosine A1 Receptor AntagonistsAdenosine A3 Receptor AntagonistsAdenosine A3 Receptor AgonistsAdenosine DeaminasePhenethylaminesPhenylisopropyladenosineTheophylline2-ChloroadenosineAdenosine KinaseTriazinesTheobrominePurinergic AntagonistsAdenosine MonophosphateCyclic AMPRadioligand AssayTriazoles5'-NucleotidasePurinesInosineAminophyllineDrug AntagonismDose-Response Relationship, DrugTubercidinNorbornanesDipyridamoleCaffeineBinding, CompetitiveAdenylate CyclaseGuinea PigsRats, Sprague-DawleyVasodilator AgentsThioinosineNucleoside Transport ProteinsAdenine NucleotidesAdenineCells, CulturedSignal TransductionCricetinaeCHO CellsRats, WistarMice, KnockoutColforsinMyocardiumMice, Inbred C57BLKineticsThionucleosidesAdenosine Deaminase Inhibitors4-(3-Butoxy-4-methoxybenzyl)-2-imidazolidinoneAdenosine TriphosphatasesNucleosidesDeoxyadenosinesAminopyridinesPhosphodiesterase InhibitorsStructure-Activity RelationshipVasodilationHyperemiaIschemic Preconditioning, MyocardialGTP-Binding ProteinsCalciumCell MembraneDogsPertussis ToxinTime Factors1-Methyl-3-isobutylxanthineEquilibrative Nucleoside Transporter 1LigandsHeart RateCyclohexanecarboxylic AcidsHeartGlyburideIsoproterenolHypoxanthineTritiumNucleoside DeaminasesCell LineIodobenzenesReceptors, Purinergic P2Coronary CirculationEnzyme InhibitorsApyraseRNA, MessengerAffinity LabelsGTP-Binding Protein alpha Subunits, GsCoformycinPurinergic P2 Receptor Antagonists