What is hyponatremic hypertensive syndrome?

Updated: Jun 17, 2019
  • Author: Eric E Simon, MD; Chief Editor: Vecihi Batuman, MD, FASN  more...
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Answer

Hyponatremic hypertensive syndrome, a rare condition, consists of severe hypertension associated with renal artery stenosis, hyponatremia, hypokalemia, severe thirst, and renal dysfunction characterized by natriuresis, hypercalciuria, renal glycosuria, and proteinuria. Angiotensin-mediated thirst coupled with nonosmotic release of vasopressin provoked by angiotensin II and/or hypertensive encephalopathy are likely mechanisms for this syndrome. Sodium depletion due to pressure natriuresis and potassium depletion due to hyperaldosteronism with high plasma renin activity are also likely to play a role in the pathogenesis of hyponatremia. The abnormalities resolve with correction of the renal artery stenosis. [32]


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