CaptoprilAngiotensin-Converting Enzyme InhibitorsProlineRadioisotope RenographyReninBlood PressureHypertension, RenovascularRenin-Angiotensin SystemAngiotensin ITechnetium Tc 99m MertiatideAngiotensin IIPeptidyl-Dipeptidase ATechnetium Tc 99m PentetateHydrochlorothiazideIodohippuric AcidHypertensionSaralasinEnalaprilIsosorbideAntihypertensive AgentsKininsBradykininRats, Inbred SHRHydralazineRenal Artery ObstructionLosartanIsosorbide DinitrateReceptors, BradykininAldosteroneHemodynamicsTetrazolesAngiotensin Receptor AntagonistsEnalaprilatRenal CirculationKidney