AdenosineReceptor, Adenosine A2AReceptor, Adenosine A1Adenosine A2 Receptor AntagonistsPurinergic P1 Receptor AntagonistsAdenosine DeaminaseAdenosine A1 Receptor AntagonistsInterleukin 1 Receptor Antagonist ProteinReceptor, Adenosine A3Receptor, Adenosine A2BNeurokinin-1 Receptor AntagonistsReceptors, Adenosine A2Adenosine KinaseReceptors, Purinergic P1Myocytes, CardiacAdenosine A2 Receptor AgonistsXanthinesRats, Sprague-DawleyDose-Response Relationship, DrugAdenosine A1 Receptor AgonistsPiperidinesPurinergic P1 Receptor AgonistsHistamine H2 AntagonistsSerotonin 5-HT3 Receptor AntagonistsHeartExcitatory Amino Acid AntagonistsAngiotensin Receptor AntagonistsCardiac OutputAdenosine A3 Receptor AntagonistsRats, WistarDopamine AntagonistsSerotonin 5-HT2 Receptor AntagonistsHormone AntagonistsPurinergic P2 Receptor AntagonistsAdenosine MonophosphateAdenosine-5'-(N-ethylcarboxamide)TheophyllineNarcotic AntagonistsHistamine H1 AntagonistsReceptors, EndothelinMuscarinic AntagonistsArrhythmias, CardiacReceptors, PurinergicTime FactorsPhenethylaminesGuinea PigsCardiac Surgical ProceduresHistamine AntagonistsSerotonin AntagonistsGABA-A Receptor AntagonistsCells, CulturedGABA AntagonistsMyocardiumCyclic AMPReceptor, Endothelin ADeath, Sudden, CardiacSialoglycoproteinsLeukotriene AntagonistsReceptors, SerotoninReceptors, N-Methyl-D-AspartateCalciumBlood PressureDizocilpine MaleateSerotonin 5-HT1 Receptor AntagonistsTetrazolesBiphenyl Compounds2-ChloroadenosineRadioligand AssayHeart RateDisease Models, AnimalAdenosine A3 Receptor AgonistsReceptors, Interleukin-1BenzazepinesAdrenergic alpha-1 Receptor AntagonistsDogsPyridinesPhenylisopropyladenosineMyocardial ContractionPyrazolesHemodynamicsNicotinic AntagonistsSulfonamidesEndothelin-1Purinergic AntagonistsAdrenergic alpha-2 Receptor AntagonistsIndolesLosartanSerotonin Receptor Agonists5'-NucleotidaseCardiomegalyInosineSignal TransductionPeptides, CyclicHistamine H3 AntagonistsSerotoninDrug InteractionsBinding, CompetitiveAzepinesMice, Inbred C57BLAngiotensin II