EnalaprilAngiotensin-Converting Enzyme InhibitorsDouble-Blind MethodPlacebo EffectAntihypertensive AgentsLosartanEnalaprilatBlood PressureCross-Over StudiesCaptoprilHypertensionHydrochlorothiazideRenin-Angiotensin SystemDrug Therapy, CombinationTreatment OutcomeAngiotensin Receptor AntagonistsTetrazolesReninPeptidyl-Dipeptidase ADipeptidesRats, Inbred SHRHeart FailureDose-Response Relationship, DrugAtenololAdministration, OralBiphenyl CompoundsAngiotensin IIKidneyAmlodipineHemodynamicsProteinuriaHeart RateAcrylatesLisinoprilHydralazineSingle-Blind MethodCoughTime FactorsRandom AllocationImidazolidinesElectrolytesClinical Trials as TopicDrug Administration ScheduleAngiotensin IBenzimidazolesRenal CirculationHypertension, RenalPerindopril