Obesity is a major cause of human essential hypertension. Recent studi
es point toward increased renal tubular reabsorption and abnormal rena
l pressure natriuresis in mediating obesity hypertension. The mechanis
ms for these renal changes appear to be multifactorial, including acti
vation of the sympathetic nervous system and altered intrarenal histol
ogy, which compresses the renal medulla.