🩺 High Blood Pressure in Pets: A Vet’s 2025 Guide to Feline and Canine Hypertension 🐶🐱

By Dr Duncan Houston, BVSc

High blood pressure, or hypertension, is a well-known concern in human medicine — but what about our pets? While dogs and cats don’t deal with stress, cigarettes, or salty diets, they can still develop dangerously high blood pressure, especially in their senior years. 🧓🐾

💥 What Does High Blood Pressure Do to Pets?

Imagine a delicate garden hose connected to a fire hydrant — the pressure is too much, and the hose bursts. This is exactly what happens to small blood vessels in your pet’s body when blood pressure gets too high. 💧➡️💥

Chronic hypertension causes damage that may go unnoticed until it's severe:

• 👁️ Eyes: Retinal bleeding or detachment → sudden or gradual blindness
• 🧠 Brain: Increased risk of embolism (clots) → seizures, strokes
• 🫀 Heart: Muscle thickening, scarring, and reduced flexibility → heart failure
• 🩺 Kidneys: Rapid disease progression due to fragile, damaged filtering vessels

📋 What Causes High Blood Pressure in Pets?

Unlike humans, where hypertension often occurs without an obvious reason, pets usually develop it due to an underlying medical condition. 🧬

⚠️ Common Conditions Causing Hypertension:

• 🐾 Chronic kidney disease (CKD): Affects 93% of dogs and 61% of cats with CKD
• 🐱 Hyperthyroidism: Affects up to 87% of untreated hyperthyroid cats
• 🩸 Glomerular disease: Kidney filtration disorder with protein loss
• 🧠 Cushing’s disease, diabetes, acromegaly (growth hormone disorder)
• 🧬 Pheochromocytoma: Adrenal tumor secreting adrenaline
• 💉 Hyperaldosteronism: Hormonal blood pressure dysregulation

🔍 If no disease is found, the pet may have primary hypertension — but this is rare. Most cases are secondary to something else.

🩺 How Is High Blood Pressure Diagnosed?

Like in humans, many pets show no obvious symptoms. That's why blood pressure screening is vital, especially for seniors or pets with any of the conditions above. 🧓📋

🔎 Common Screening Triggers:

• 🩺 Routine senior exams
• 👁️ Sudden vision changes, eye bleeding, or retinal detachment
• 🧠 Sudden, unexplained neurologic symptoms (suggesting stroke or embolism)
• 🫀 Diagnosis of heart disease

If your pet’s vision seems off or behavior changes suddenly, don’t delay — contact your vet immediately. Vision loss may be reversed with early intervention. 👁️🚨

🔊 How Do Vets Measure Blood Pressure in Pets?

Measuring blood pressure in animals is slightly different from humans:

• 🩹 A cuff is placed on a leg, foot, or tail
• 🔊 An ultrasonic probe detects the pulse (diastolic pressure cannot be measured without invasive methods)

🐾 Normal systolic pressure: under 160 mmHg
🔴 Danger zone: 180 mmHg or higher = risk of organ damage

To rule out "white coat syndrome," at least 5 readings are taken to ensure accuracy. Most pets tolerate the process well. 🧘

💊 Treatment Options for High Blood Pressure

Treatment starts with identifying and managing the underlying condition. In many cases — especially with hyperthyroid cats — controlling the root cause can normalize blood pressure. 🧬

📈 If Medication Is Needed:

• 💊 Amlodipine: A calcium channel blocker, most effective in cats and used for dogs as well. Available in generic form and transdermal gel.
• 🧪 Telmisartan: An angiotensin II receptor blocker (ARB), especially helpful in kidney-related hypertension.
• 🌀 Prazosin & Hydralazine: Vasodilators that may be added for dogs
• 💓 Beta-blockers: Used to control reflex tachycardia

❗ ACE inhibitors and diuretics are less effective in pets as primary treatments.

🍽️ Dietary Considerations

Salt restriction sounds helpful — but data in pets is limited. However, for pets with kidney disease, low-salt prescription diets offer tailored support. 🥦

If your pet is picky or prescription diets aren’t working, ask your vet about custom nutrition plans via BalanceIt.com or a veterinary nutritionist. 🧑‍🍳

🗓️ Long-Term Monitoring

Once blood pressure is under control, regular monitoring is essential. Recheck appointments are typically scheduled every 2–4 months. 🩺📅

Expect dose adjustments over time, especially if new health issues arise or the current treatment becomes less effective. 📈

📚 Real Study, Real Impact

A 2007 study of 141 cats with hypertension showed:

• 🔍 87% had renal disease or hyperthyroidism
• 💊 96% stabilized on amlodipine within ~20 days
• 📉 Dose adjustments were needed in 50%

Key takeaway: With consistent care, hypertension is very manageable — especially with early detection. ❤️🐈

📱 Ask A Vet for Support

If you're unsure whether your pet should be screened for high blood pressure or need help managing an existing diagnosis, Ask A Vet is here for you.

• 💬 Chat with licensed vets anytime
• 📈 Track your pet’s meds and progress
• 🗓️ Get reminders for check-ups and tests

Visit AskAVet.com or download the Ask A Vet App today to keep your furry friend’s heart and organs protected. 🐾💓

🧠 Final Thoughts from Dr Duncan Houston

Hypertension is a silent but serious threat to our pets’ health. With the right screening, diagnosis, and treatment, we can prevent blindness, strokes, kidney failure, and more. 🧠🫀

If your dog or cat is aging or has any related conditions, don’t wait. Ask your vet about blood pressure screening — it could be lifesaving. 💖🐕🐈