These tools will no longer be maintained as of December 31, 2024. Archived website can be found here. PubMed4Hh GitHub repository can be found here. Contact NLM Customer Service if you have questions.


Pubmed for Handhelds

PUBMED FOR HANDHELDS

Search MEDLINE/PubMed

  • Title: Primary hyperaldosteronism due to adrenal microadenoma: a curable cause of refractory hypertension.
    Author: Myint KS, Watts M, Appleton DS, Lomas DJ, Jamieson N, Taylor KP, Coghill S, Brown MJ.
    Journal: J Renin Angiotensin Aldosterone Syst; 2008 Jun; 9(2):103-6. PubMed ID: 18584586.
    Abstract:
    UNLABELLED: The diagnosis of primary hyperaldosteronism due to microadenoma or unilateral adrenal hyperplasia can be challenging, since hypokalaemic alkalosis, high plasma aldosterone and a definite adenoma on imaging may all be absent. METHOD AND RESULT: We describe three cases of resistant hypertension (on > or = 5 antihypertensives) where hyperaldosteronism was suspected because of a suppressed plasma renin level despite treatment with multiple drugs which normally elevate renin. Renin mass was measured by a double-site chemi-immunoluminometric assay. All patients had normal plasma aldosterone levels. Hypokalaemia was present in the first two cases but computed tomography did not show clear cut adenomas. Adrenal vein sampling (AVS) revealed lateralisation (> 4 times higher aldosterone to cortisol ratio (ACR) on the affected than contra-lateral side). The third patient was normokalaemic and AVS showed only minimal lateralisation (ACR 1.3:1). The severe hypertension in all cases was reversed by adrenalectomy, with blood pressure falling to target despite withdrawal of all but one to two drugs. CONCLUSIONS: The robotic assay of renin mass permits rapid detection of patients in whom plasma renin is suppressed below the normal range. A suppressed plasma renin indicates abnormal Na+-retention, and--when not overcome by drugs such as angiotensin-converting enzyme-inhibitors or angiotensin receptor blockers--may be the only clue to a curable adrenal adenoma. AVS is required to demonstrate lateralisation of aldosterone secretion, justifying adrenalectomy.
    [Abstract] [Full Text] [Related] [New Search]