Dog Hypertension: Silent Organ Damage

Hypertension in dogs causes progressive organ damage to kidneys, heart, and eyes, often secondary to underlying endocrine or renal disease.

Key Facts

Systolic blood pressure above 160 mmHg is considered hypertensive in dogs
Secondary hypertension is far more common than primary - underlying causes include Cushing's, CKD, and hypothyroidism
Hypertensive retinopathy causes retinal hemorrhage and detachment, potentially causing sudden blindness
Left ventricular hypertrophy from sustained pressure overload causes cardiac damage over time
Amlodipine is the most common antihypertensive medication used in dogs with good efficacy
Regular blood pressure monitoring allows early detection before irreversible end-organ damage
Dogs with treated hypertension can maintain good quality of life with medication
Dogs rarely show clinical signs until damage is severe making regular monitoring essential

Welfare Considerations

Hypertension causes insidious silent organ damage - kidneys fail progressively, the heart hypertrophies, and retinal vessels hemorrhage before obvious clinical signs appear. Sudden blindness from hypertensive retinal detachment is a dramatic welfare event that can often be prevented with monitoring and treatment. Regular blood pressure measurement in at-risk dogs - particularly those with known kidney disease or endocrine disorders - enables early intervention before irreversible damage occurs.

What You Can Do

Measure blood pressure in dogs with known kidney disease, Cushing's, or other hypertension risk conditions
Examine the retinas in hypertensive dogs for early hemorrhage changes requiring urgent treatment
Treat the underlying cause of hypertension when identified alongside blood pressure control
Follow antihypertensive prescriptions consistently and monitor response with regular rechecks
Keep an accurate record of blood pressure measurements to track trends over time
Recognize sudden behavioral changes or apparent vision loss as potential hypertensive emergency signs