2',3'-Cyclic-Nucleotide PhosphodiesterasesPhosphoric Diester HydrolasesCyclic GMPPhosphodiesterase InhibitorsNucleotidasesGuanosine MonophosphatePurinones3',5'-Cyclic-GMP Phosphodiesterases1-Methyl-3-isobutylxanthinePhosphodiesterase 5 InhibitorsCyclic AMPGuanylate Cyclase3',5'-Cyclic-AMP PhosphodiesterasesAtrial Natriuretic FactorSulfonesCyclic Nucleotide Phosphodiesterases, Type 5Nitric OxideRolipramPurinesCyclic GMP-Dependent Protein KinasesDibutyryl Cyclic GMPCyclic Nucleotide Phosphodiesterases, Type 2Nucleotides, CyclicNitroprusside8-Bromo Cyclic Adenosine MonophosphateMethylene BlueGuanosine4-(3-Butoxy-4-methoxybenzyl)-2-imidazolidinoneTheophyllineCyclic Nucleotide Phosphodiesterases, Type 4Nitric Oxide DonorsPenile ErectionPiperazinesPenisErectile DysfunctionReceptors, Atrial Natriuretic FactorNitric Oxide SynthasePhosphodiesterase 3 InhibitorsGMP ReductaseMuscle RelaxationPhosphodiesterase 4 InhibitorsCyclic Nucleotide Phosphodiesterases, Type 6Dose-Response Relationship, DrugMilrinoneNelumboCyclic Nucleotide Phosphodiesterases, Type 3Second Messenger SystemsVasodilator AgentsBucladesineArgininePapaverineCyclic GMP-Dependent Protein Kinase Type IMuscle, Smooth, VascularCells, CulturedColforsinAorta, ThoracicPyrrolidinonesSignal TransductionKineticsRats, Sprague-DawleyVasodilationEnzyme InhibitorsNatriuretic Peptide, C-TypeNitritesFerricyanidesPhosphodiesterase ICalciumCyclic Nucleotide Phosphodiesterases, Type 1Enzyme ActivationAdenylate Cyclaseomega-N-MethylarginineRats, Inbred StrainsGuanosine 5'-O-(3-Thiotriphosphate)PentoxifyllineNG-Nitroarginine Methyl EsterXanthinesOxadiazolesGuanosine TriphosphateNatriuresisEndothelium, VascularRabbitsNatriuretic Peptide, BrainNitric Oxide Synthase Type IIIMuscle, SmoothIsoproterenolPyridazinesTime FactorsAcetylcholineCitrullineNorepinephrineAdenosine MonophosphateBlood PlateletsRats, WistarInosine MonophosphateS-Nitroso-N-AcetylpenicillamineNitratesNitroglycerinThionucleotidesHemodynamicsDisease Models, Animal