"Marked fluid retention is not usually observed in patients with primary
hyperaldosteronism because they undergo what is called the “escape
phenomenon”: as aldosterone levels rise, there is marked initial fluid retention;
after several days (1–2 weeks), there is a natriuresis, resulting in a drop in blood
volume (34). It is now thought that ANP is at least partially involved in the
development of this escape phenomenon. Nakamuraetal ..."
Hypertension Medicine(2nd Edition) (Current Clinical Practice) by MichaelL. Prisant Pasta Dura, 400 Pages, Published 2010 by Humana Pr ISBN-13: 978-1-58829-876-8, ISBN: 1-58829-876-0