Heart FailureKidneyKidney Function TestsGlomerular Filtration RateCreatinineKidney DiseasesKidney Failure, ChronicRenal InsufficiencyTreatment FailureAcute Kidney InjuryProteinuriaRenal CirculationTreatment OutcomeKidney TransplantationTime FactorsRenal Artery ObstructionRadioisotope RenographyRetrospective StudiesCystatin CRenal DialysisNephrectomyBlood Urea NitrogenTechnetium Tc 99m MertiatideBlood PressureProspective StudiesFollow-Up StudiesFailure to ThriveRenal ArteryRenal Insufficiency, ChronicBiological MarkersDiuresisKidney TubulesLiver Failure, AcuteAnuriaRisk FactorsCardio-Renal SyndromeRenal Plasma Flow, EffectivePeritoneal DialysisAlbuminuriaTechnetium Tc 99m PentetateLiver FailureChronic DiseaseImmunosuppressive AgentsDiureticsDiabetic NephropathiesAngiotensin-Converting Enzyme InhibitorsPrognosisMetabolic Clearance RateUreaHypertension, RenalHemodynamicsMultiple Organ FailureHypertensionRenal Plasma FlowDisease ProgressionHydronephrosisGlomerulonephritisNatriuresisNephritis, InterstitialKidney GlomerulusUremiaFurosemideHeart Failure, SystolicCyclosporineCardiac Output, LowHypertension, RenovascularGraft RejectionCystatinsGlomerulonephritis, IGAIothalamic AcidKidney Tubular Necrosis, AcutePredictive Value of TestsInulinSeverity of Illness IndexUreteral ObstructionCohort StudiesIodohippuric AcidReninNatriuretic Peptide, BrainPostoperative ComplicationsDrug Therapy, CombinationDisease Models, AnimalSodiumHalf-LifeEquipment FailureRhabdomyolysisPeritoneal Dialysis, Continuous AmbulatorySurvival RateUric AcidUrinep-Aminohippuric AcidRisk AssessmentEnalaprilRats, Sprague-DawleyMycophenolic AcidAntihypertensive AgentsTacrolimusBiopsyOliguriaNephrotic Syndrome