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  • Title: Angiotensin-responsive aldosterone-producing adenomas: postoperative disappearance of aldosterone response to angiotensin.
    Author: Tunny TJ, Klemm SA, Stowasser M, Gordon RD.
    Journal: Clin Exp Pharmacol Physiol; 1993 May; 20(5):306-9. PubMed ID: 8324914.
    Abstract:
    1. Nineteen out of 47 patients (40%) with confirmed unilateral aldosterone-producing adenoma (APA) were responsive to low-dose angiotensin II infusion (AII-R), as defined by an increase in plasma aldosterone concentration of > 50% over basal at 2 ng/kg per min for 60 min. 2. Seven to ten days after unilateral adrenalectomy, aldosterone was no longer responsive to angiotensin infusion in AII-R APA (100%, n = 17). Therefore, angiotensin responsiveness resides within the adenoma in AII-R APA. 3. The upright posture test for the differentiation of adenoma from hyperplasia was unreliable for the AII-R APA (26%), but generally reliable in the angiotensin-unresponsive subtype, (AII-U APA, 96%). 4. The reported predominance of females in APA was seen in AII-U APA (68%), but was reversed in AII-R APA (37%).
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