SulfonesPurinesPiperazinesErectile DysfunctionPhosphodiesterase InhibitorsPhosphodiesterase 5 Inhibitors3',5'-Cyclic-GMP PhosphodiesterasesHealth Care CostsCyclic Nucleotide Phosphodiesterases, Type 5Costs and Cost AnalysisDrug CostsCost of IllnessPenile ErectionVasodilator AgentsHomosexuality, MaleMethamphetamineVentricular Dysfunction, LeftCyclic GMPGeorgiaCost ControlDirect Service CostsCost-Benefit AnalysisCost SharingUnsafe SexCost AllocationRisk-TakingSexual BehaviorVentricular DysfunctionSexual Dysfunction, PhysiologicalSexual Dysfunctions, PsychologicalEndothelium, VascularVentricular Dysfunction, RightDisease Models, AnimalTime FactorsModels, EconomicOxidative StressTreatment OutcomeEmployer Health CostsQuality-Adjusted Life YearsPrimary Graft DysfunctionDiastoleVasodilationAutonomic Nervous System DiseasesHeart FailureProspective StudiesMitochondriaUnited StatesRetrospective StudiesMyocardiumMyocardial ContractionEchocardiographyMultiple Organ FailureCardiomyopathiesSeverity of Illness IndexImpotence, VasculogenicRisk FactorsMice, Inbred C57BLMitochondrial DiseasesCognition DisordersBiological MarkersNitric OxideSystoleVentricular Function, LeftFollow-Up StudiesPenisHeartStroke VolumeReactive Oxygen SpeciesRats, Sprague-DawleyAnalysis of VarianceChronic DiseaseKidney DiseasesHeart Failure, DiastolicBlood PressureCase-Control StudiesHemodynamicsHealth ResourcesNitric Oxide Synthase Type IIIVascular DiseasesHospitalizationAgingMice, KnockoutLength of StayVentricular RemodelingAcetylcholineSensitivity and SpecificityBrainEchocardiography, DopplerHypertensionMice, TransgenicCohort StudiesEnergy MetabolismRats, WistarCells, CulturedHeart DiseasesMyocytes, CardiacPredictive Value of TestsNeuropsychological TestsManaged Care ProgramsMagnetic Resonance Imaging