Liz Buchanan BVSc MRCVS
Keymaster
Hello and yes - there are a few ways in which blood tests can help with this diagnosis. Most cats with hyperaldosteronism present with low Potassium levels or abnormally high blood pressure, so checking for either of these could provide a clue - but they are not necessarily diagnostic, because Potassium levels can be high for other reasons and are not high in every hyperaldosterone case - and the same can be said of blood pressure. Merek's veterinary manual cites plasma renin activity, together with the Aldosterone : Renin ratio, as the gold standard test. However, one would have to speak to laboratories about the availability of testing.
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