Feline hypertension causes target organ damage including sudden blindness, neurological signs, and kidney injury. Early recognition and treatment prevent catastrophic welfare events.
Feline hypertension can transition from clinically silent to welfare emergency without warning. The most dramatic presentation is acute onset blindness from hypertensive retinopathy: elevated blood pressure damages retinal blood vessels, causing retinal detachment within hours or days. Owners notice their cat bumping into furniture, becoming disoriented, and showing dilated, unresponsive pupils. This is a treatable welfare emergency — prompt blood pressure reduction and referral to an ophthalmologist can restore vision if treatment begins within hours of detachment.
Chronic uncontrolled hypertension causes more insidious welfare harm: progressive kidney injury in cats already managing CKD, left ventricular hypertrophy causing cardiac dysfunction, and brain injury from cerebrovascular changes. These effects accumulate silently over months, eroding organ reserve and welfare without dramatic warning signs.
Blood pressure measurement at every veterinary visit for cats over 7 years, and at every visit for cats with CKD or hyperthyroidism, provides the monitoring necessary for early intervention. Amlodipine treatment is safe, inexpensive, and highly effective — most cats achieve target blood pressure within 1-2 weeks of starting treatment.