the putative role of the central nervous system in the maintenance of elevated blood pressure in patients with essential hypertension ( eh ) and renal hypertension [ unilateral renal parenchymal disease ( rpd ) and unilateral renal artery stenosis ( ras ) ] was studied by investigating the cardiovascular and hormonal effects of the predominantly centrally acting sympatholytic agent , clonidine .
C0035067
renal
C0007226
cardiovascular