Abstract

Structural changes in resistance vessels were studied by (a) hindquarter perfusion; and (b) planimetry of cross-sections of renal arterioles in uninephrectomized rats treated for 10 weeks with saline and either DOCA (deoxycorticosterone acetate), DOCA plus hydrallazine, vehicle plus hydrallazine or vehicle only. DOCA-treated rats developed hypertension and structural change. Addition of hydrallazine prevented both hypertension and the development of structural change. Structural arteriolar change in DOCA/salt hypertension is related to the high blood pressure or a closely associated factor rather than some other effect of DOCA.

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