Hypertension-High Blood Pressure, Low Potassium-May Not Be Due to Diuretics or CKD

More on hyperaldonsteronism:

CKD can be misdiagnosed as a primary issue when it can be a secondary issue caused by hyperaldosteronism.

It's rare for HCM cats to be tested for this as CKD and low potassium come with taking diuretics. HCM cats do not generally get hypertension. So if your HCM cat has hypertension, test the cat also for hyperaldosteronism.

And test your non-HCM cat as well.

"Depending on the etiology, PHA can be treated surgically or medically, which may cure or alleviate the associated hypertension and/or hypokalemia. Primary hyperaldosteronism is most likely underdiagnosed, which excludes a potentially large number of cats from appropriate therapy and a possible cure for the disease.

This may in part be due to the frequent association of arterial hypertension and/or hypokalemia with chronic kidney disease (CKD). Often, CKD is thought to be the causal factor of the hypertension and/or hypokalemia, when in fact the CKD may be a consequence of PHA."

https://www.merckvetmanual.com/endocrine-system/the-adrenal-glands/feline-primary-hyperaldosteronism?fbclid=IwAR0Ufs9_DcwxXLKLQWa-yAp7E0J6K88qKMuXXt8kkfOyZYWT03HvaUvDYis