Blood Pressure Measurement
In Dogs and Cats
Medically reviewed by Scott Rizzo, DVM, MS, DACVIM (SAIM), MBA. Last reviewed October 11, 2026.
Understanding Blood Pressure in Pets
Blood pressure reflects how effectively blood circulates throughout the body, delivering oxygen and nutrients to vital organs like the kidneys, eyes, heart, and brain. It measures the force of blood pushing against the walls of the arteries. In veterinary medicine, the most clinically important value is systolic blood pressure, which reflects pressure when the heart contracts.
In dogs and cats, abnormal blood pressure - whether it's too high or too low - can quietly cause serious health problems or signal underlying disease before obvious symptoms appear. Sustained abnormalities in blood pressure can lead to damage in organs such as the kidneys, eyes, heart, and brain - even when outward signs are subtle or not yet visible.
Because pets can't tell us how they feel, blood pressure measurement is an important diagnostic tool used to detect problems early and guide medical care.
Why Blood Pressure Is Measured
Blood pressure may be checked during routine evaluations, chronic disease monitoring, or when a pet is acutely ill.
It helps veterinarians:
- Detect high blood pressure (hypertension)
- Identify low blood pressure (hypotension)
- Monitor response to medications
- Reduce the risk of long-term organ damage
- Assess stability in hospitalized or critical patients
Because many conditions affect circulation, blood pressure is especially important in pets with kidney disease, endocrine disorders, heart disease, or other systemic illnesses.
How Blood Pressure Is Measured in Pets
Blood pressure in dogs and cats is measured non-invasively using a cuff placed on a limb or tail. However, the method and technique used matter significantly. Not all blood pressure measurements are equally accurate, especially in small, stressed, or conscious patients.
There are two main methods:
Oscillometric (automated) devices, which estimate blood pressure using algorithms
Doppler ultrasonic devices, which directly detect blood flow using sound waves
At Veterinary Specialist Partners, we use Doppler ultrasonic blood pressure measurement, which is widely considered the gold standard for non-invasive blood pressure monitoring in dogs and cats.
This method works by:
- Placing an appropriately sized cuff on a limb or tail
- Positioning a small probe over an artery
- Inflating the cuff to temporarily stop blood flow
- Slowly releasing pressure until blood flow is detected again
The point at which blood flow returns corresponds to the pet's systolic blood pressure.
Doppler measurement is preferred because it directly detects arterial blood flow and allows consistent, repeatable measurements. It performs well in awake or mildly stressed patients, and it proves most reliable in cats and small dogs. To ensure accuracy, pets are given time to relax, proper cuff sizing is used, and multiple readings are taken and averaged.
How to Take a Dog or Cat's Blood Pressure, Step by Step
A reading you can trust takes more than a cuff. Here is how we do it at VSP:
- Choose the method. Vets use either a Doppler unit, which picks up blood flow with a small probe over an artery, or an oscillometric monitor, which reads pressure changes in the cuff automatically. We use Doppler, which tends to be the more reliable choice in cats and small dogs.
- Start calm. Readings are taken in a quiet room after your pet has had several minutes to settle in. Stress and excitement can push the numbers up.
- Use a cuff that fits. The cuff width should be about 30 to 40% of the circumference of the leg or tail where it sits. A cuff that is too narrow reads falsely high, and one that is too wide reads falsely low.
- Take several readings and average them. The first reading is discarded, then we take a series of consistent readings and use the average.
- Write down how it was done. We record the cuff size, the site (which leg or the tail) and your pet's position, so the next check can be done the same way and compared fairly.
Can you check your pet's blood pressure at home? It's harder than it sounds. Accurate readings take the right equipment, the right cuff and a calm patient, so blood pressure should be measured or confirmed at the clinic.
Causes of High Blood Pressure (Hypertension)
High blood pressure in pets is usually secondary to an underlying condition, rather than a disease on its own.
Common causes include:
- Kidney disease
- Hyperthyroidism (especially in cats)
- Cushing's disease
- Diabetes mellitus
- Adrenal tumors such as pheochromocytoma
- Certain medications
- Chronic pain or stress
If left untreated, hypertension can lead to serious complications, including kidney damage, vision loss, heart disease, and neurologic changes.
Causes of Low Blood Pressure (Hypotension)
Low blood pressure is most often associated with acute or critical illness and can reduce blood flow to vital organs.
Common causes include:
- Shock or trauma
- Severe dehydration
- Blood loss or anemia
- Severe infection (sepsis)
- Advanced heart disease
- Effects of anesthesia or medications
Hypotension is most commonly seen in hospitalized or emergency patients and requires prompt evaluation.
What Abnormal Blood Pressure Means for Your Pet
Abnormal blood pressure is not a diagnosis by itself - it is a clinical finding that helps guide further investigation.
Your veterinarian will interpret blood pressure results in the context of your pet's overall health and may recommend:
- Additional diagnostic testing
- Treatment of the underlying condition
- Blood pressure medication
- Ongoing monitoring
Identifying and managing blood pressure abnormalities early helps protect organ function and improve long-term outcomes. Some pets may only need occasional blood pressure checks, while others - especially those with chronic conditions - require regular monitoring.
Our Approach at VSP
At Veterinary Specialist Partners, blood pressure measurement is treated as a precision diagnostic tool, not just a routine number.
Our Internal Medicine and Emergency/Urgent Care teams use:
- Gold-standard Doppler blood pressure monitoring
- Careful measurement technique
- Multiple readings for accuracy
- Clinical context to interpret results
When abnormalities are detected, our focus is on identifying the cause, minimizing organ damage, and developing a treatment plan tailored to your pet's needs.
Our team will recommend a personalized plan based on your pet's diagnosis, ensuring blood pressure is managed appropriately over time.
Concerned About Your
Pet's Blood Pressure?
If your pet has been diagnosed with a condition that may affect blood pressure - or if you're noticing changes in their health - our team is here to help. At VSP, we use advanced diagnostic tools and a thoughtful, individualized approach to evaluate and monitor blood pressure in dogs and cats.
Call us today to schedule an evaluation or speak with our team about your pet's needs.
Blood pressure measurement is available at VSP Louisville and by appointment at VSP Evansville. Call (502) 901-7990 for either location.
High Readings? Book an Internal Medicine Consult
No referral needed. Book an internal medicine consult in Louisville or Evansville, and we will keep your family veterinarian in the loop. Questions first? Call (502) 901-7990.
Frequently Asked Questions
Why is blood pressure important for my pet?
Blood pressure helps us understand how well blood is circulating to your pet's vital organs, including the kidneys, eyes, heart, and brain. When blood pressure is too high or too low, it can lead to serious complications or signal an underlying disease - often before obvious symptoms appear. Monitoring it allows us to catch problems early and protect your pet's long-term health.
How is blood pressure measured in dogs and cats?
Blood pressure is measured using a small cuff placed on your pet's limb or tail, similar to how it's done in people. At VSP, we use Doppler ultrasound technology to detect blood flow and obtain an accurate reading while your pet is awake and comfortable.
Does measuring blood pressure hurt my pet?
Not at all. Blood pressure measurement is painless and well-tolerated by most pets. We take time to help your pet relax and typically collect multiple readings to ensure the results are as accurate as possible.
Why does VSP use Doppler blood pressure instead of automated machines?
Not all blood pressure methods are equally reliable in pets. Automated machines estimate blood pressure and can be less accurate in cats, small dogs, or stressed patients. Doppler technology directly detects blood flow, which allows us to get more consistent and reliable findings, especially in awake pets.
What causes high blood pressure in dogs and cats?
High blood pressure is usually caused by another underlying condition rather than occurring on its own. Common causes include kidney disease, hyperthyroidism, Cushing's disease, diabetes, certain tumors, medications, or chronic illness. Identifying the underlying cause is an important part of treatment.
What causes low blood pressure?
Low blood pressure is most often associated with more serious or acute conditions, such as dehydration, blood loss, infection, trauma, or heart disease. It is commonly seen in hospitalized or emergency patients and requires prompt evaluation.
What does it mean if my pet has abnormal blood pressure?
An abnormal blood pressure reading doesn't provide a diagnosis by itself, but it gives us important information about your pet's health. Our team will interpret the result in context and may recommend additional testing, treatment, or monitoring to address the underlying cause and protect organ function.
Will my pet need ongoing blood pressure monitoring?
Some pets only need occasional blood pressure checks, while others - especially those with chronic conditions like kidney or endocrine disease - benefit from regular monitoring. We'll recommend a plan that fits your pet's specific needs so we can track changes over time and adjust care as needed.
Will my primary veterinarian stay involved in my pet’s care?
You don't have to choose between specialty care and your trusted veterinarian. We work closely with referring doctors and share detailed findings and recommendations. This team-based approach ensures your pet receives consistent, coordinated care at every stage.