Objective—To determine prevalence of systolic
hypertension and associated risk factors in cats with
chronic renal failure evaluated in first-opinion practice.
Animals—103 cats with chronic renal failure.
Procedure—Systolic arterial blood pressure (SABP)
was measured with a noninvasive Doppler technique,
and cats that had SABP > 175 mm Hg on 2
occasions or that had SABP > 175 mm Hg and compatible
ocular lesions were classified as hypertensive.
Information from the history (previous treatment
for hyperthyroidism, age), physical examination
(sex, body weight), routine plasma biochemical
analyses (creatinine, cholesterol, potassium, sodium,
chloride, and calcium concentrations), and thyroid
status were evaluated as potential risk factors for
systolic hypertension. Variables associated with systolic
hypertension were evaluated by use of logistic
Results—20 (19.4%; 95% confidence interval, 13 to
28%) cats had systolic hypertension. Plasma potassium
concentration was significantly and inversely
associated with systolic hypertension.
Conclusions and Clinical Relevance—Prevalence of
systolic hypertension, although clinically important,
was lower than that reported previously. The cause of
the inverse association between systolic hypertension
and plasma potassium concentration is not yet
known. (J Am Vet Med Assoc 2002;220:1799–1804)