Cat Hypertension: Silent Damage and the Importance of Blood Pressure Screening
Feline hypertension causes progressive damage to eyes, kidneys, heart, and brain that accumulates silently before causing catastrophic events, making routine blood pressure screening one of the most important senior cat welfare interventions.
Key Facts
Hypertension (systolic pressure above 160 mmHg) affects approximately 20% of cats over 15 years
Primary causes include hyperthyroidism, chronic kidney disease, and primary hypertension (idiopathic)
Sudden blindness from retinal detachment is often the first clinical sign owners notice
Restoration of vision is possible in some cats if treatment begins within days of retinal detachment
Amlodipine is the first-line antihypertensive medication for cats and is highly effective
Blood pressure measurement in cats requires specific technique and acclimatization for accurate readings
Annual blood pressure measurement is recommended for cats over 9 years
Treating hypertension dramatically slows progression of concurrent kidney disease
Welfare Considerations
Feline hypertension is a welfare emergency hiding in plain sight - cats with dangerously elevated blood pressure appear normal until catastrophic organ damage occurs. The sudden blindness that often reveals hypertension represents acute, preventable welfare harm that could have been averted by routine blood pressure monitoring. Cats that become blind are highly distressed - they cannot understand why their world has changed. Treatment that restores vision within days is one of veterinary medicine's most remarkable welfare interventions. The welfare case for annual blood pressure screening in senior cats is overwhelming.
What You Can Do
Request blood pressure measurement at every veterinary visit for cats over 9 years
Seek emergency veterinary care immediately if your cat appears suddenly blind or disoriented
Administer amlodipine daily as prescribed without missing doses - consistent control prevents damage
Monitor for signs of secondary organ damage: increased drinking, weight loss, heart murmur
Treat concurrent hyperthyroidism or kidney disease to address secondary hypertension causes
Support research into earlier detection methods for feline hypertension before end-organ damage occurs