Renal Hypertension in Cats: Welfare Management

Hypertension secondary to chronic kidney disease affects many older cats. Unmanaged high blood pressure causes blindness, strokes, and cardiac damage, significantly impacting welfare.

Key Facts

Hypertension affects approximately 20 to 65% of cats with chronic kidney disease
Sudden blindness from hypertensive retinopathy can occur without warning
Systolic blood pressure above 160 mmHg is considered hypertensive in cats
Amlodipine is the most commonly prescribed first-line antihypertensive in cats
Vision can sometimes be partially recovered if treatment is started within hours of acute blindness

Welfare Considerations

Hypertension in cats is a silent condition - most cats show no outward signs until end-organ damage occurs. The sudden loss of vision from retinal detachment is traumatic: a cat that could see normally wakes to complete blindness, causing profound disorientation and fear. Regular blood pressure monitoring in cats with kidney disease, hyperthyroidism, or those over 10 years old enables treatment before these devastating complications occur. The welfare case for proactive blood pressure management in at-risk cats is compelling.

What You Can Do

Ask your vet to measure your cat's blood pressure at every annual check after age 10
Ensure cats with kidney disease or hyperthyroidism are monitored for hypertension every 3 to 6 months
Start antihypertensive treatment promptly when hypertension is diagnosed
Seek emergency veterinary care immediately if your cat suddenly becomes disorientated or appears unable to see
Provide a consistent, calm home environment for hypertensive cats to minimize acute pressure spikes