Cat Blood Pressure Chart (Normal Ranges & Risk Categories)
Reference chart of feline blood pressure: normal systolic range, ACVIM hypertension categories, organ damage risks, screening frequency, and treatment thresholds.
Quick answer: Normal systolic blood pressure for a cat is under 140 mmHg. Veterinary (ACVIM) categories are: under 140 normotensive, 140 to 159 prehypertensive, 160 to 179 hypertensive, and 180 or above severely hypertensive. Treatment usually starts when pressure stays at 160 or higher on repeat visits, or immediately when the eyes, kidneys, heart, or brain already show damage.
High blood pressure is one of the most common and most silent problems in cats over 10, and it is tightly linked to the two big senior diseases, chronic kidney disease and hyperthyroidism. This page compiles the standard veterinary reference numbers so you can understand your cat's readings and ask better questions. It is researched general information, not veterinary advice; diagnosis and treatment decisions belong to your vet.
Cat Blood Pressure Chart (Systolic, mmHg)
| Systolic Pressure | Category | Risk of Organ Damage | Typical Veterinary Response |
|---|---|---|---|
| Under 140 mmHg | Normotensive | Minimal | Routine screening at senior visits |
| 140 to 159 mmHg | Prehypertensive | Low | Recheck in about 3 to 6 months, look for underlying disease |
| 160 to 179 mmHg | Hypertensive | Moderate | Confirm on repeat visits, treat if persistent or if organs show damage |
| 180 mmHg and above | Severely hypertensive | High | Confirm promptly, treatment usually started, urgent if eyes affected |
These categories follow the widely used ACVIM consensus framework, which is also how the IRIS system substages kidney disease by blood pressure; see the IRIS CKD staging chart. Diastolic pressure is measured less consistently in cats, so decisions rest mainly on the systolic number.
What High Blood Pressure Damages
| Target Organ | Damage | Signs You Might See |
|---|---|---|
| Eyes | Retinal bleeding and detachment | Sudden blindness, dilated pupils that stay wide, bumping into things |
| Kidneys | Faster CKD progression, protein loss in urine | Rising creatinine and SDMA, increased thirst and urination |
| Heart | Thickened heart muscle | New murmur or gallop rhythm on exam, breathing changes |
| Brain | Bleeding or swelling | Disorientation, night yowling, wobbliness, seizures |
Retinal damage is the most visible emergency. If your senior cat goes suddenly blind or the pupils stop responding to light, this is a same-day veterinary problem; rapid treatment sometimes restores partial vision. Read more in vision loss in senior cats.
Screening and Recheck Frequency
| Situation | Suggested Frequency |
|---|---|
| Healthy mature cat, 7 to 10 years | Baseline reading, then yearly |
| Healthy senior cat, 11 years and older | At least yearly, every 6 months for geriatric cats |
| Cat with CKD, hyperthyroidism, or heart disease | At diagnosis, then every 3 to 6 months |
| Prehypertensive reading (140 to 159) | Recheck in about 3 to 6 months |
| Newly started or changed medication | Recheck in about 1 to 2 weeks |
| Stable on medication | Roughly every 3 months |
Why One High Reading Is Not a Diagnosis
Cats are famous for situational hypertension, often called white-coat effect. Clinic stress can raise systolic pressure by 15 to 20 mmHg or more in a healthy cat. Good measurement technique controls for this: a quiet room, 5 to 10 minutes of settling time with the owner present, a correctly sized cuff, and the average of five to seven readings with the first discarded. Unless pressure is very high or the retinas already show damage, vets confirm hypertension across two or more visits before starting daily medication.
Treatment at a Glance
Amlodipine is the standard first-line drug and controls pressure in most cats with a small once-daily tablet; telmisartan is an alternative, especially when the kidneys are losing protein. The vet also hunts for and treats the underlying cause, most often kidney disease or an overactive thyroid; see the T4 levels chart for that workup. Treated well, hypertensive cats commonly live comfortably for years, which makes the case for routine screening in every cat past 9 or 10. Pilling technique matters for a daily tablet; our guide on how to give a cat a pill can help.
Blood pressure is one number in a bigger senior panel. For the rest of the reference ranges, see senior cat normal lab values and vital signs, and use the wellness screening schedule to plan visits.
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Frequently Asked Questions
What is a normal blood pressure for a cat?
A relaxed, healthy cat typically has a systolic blood pressure under 140 mmHg. The ACVIM consensus guidelines class under 140 as normotensive, 140 to 159 as prehypertensive, 160 to 179 as hypertensive, and 180 or higher as severely hypertensive. Because clinic stress inflates readings, vets average several measurements after the cat has had time to settle before assigning a category.
At what blood pressure does a cat need treatment?
Most veterinarians treat when systolic pressure is persistently 160 mmHg or higher on repeat visits, and treat promptly at any level if there is already damage to the eyes, kidneys, heart, or brain. A single high reading in a stressed cat is usually rechecked before starting medication, unless the pressure is very high or the retinas show changes. Your vet weighs the number against the whole clinical picture.
What are the signs of high blood pressure in cats?
Hypertension is mostly silent until it damages an organ, which is why it is called a silent killer in senior cats. The most dramatic sign is sudden blindness from retinal detachment, with dilated pupils that do not respond to light. Other signs include bumping into furniture, disorientation, night yowling, seizures, or worsening kidney values. Many hypertensive cats show nothing at all, which is why routine screening matters.
What causes high blood pressure in senior cats?
Most feline hypertension is secondary to another disease, with chronic kidney disease and hyperthyroidism the two leading causes. Roughly one in five cats with CKD and a meaningful share of hyperthyroid cats develop high blood pressure. Primary hypertension without an underlying disease also occurs in older cats. This is why a high reading triggers bloodwork and urine testing, not just a prescription.
How is blood pressure measured in cats?
Vets use an inflatable cuff on a front leg or the tail with a Doppler probe or an oscillometric monitor to detect flow. Good technique includes a quiet room, 5 to 10 minutes of acclimation, a properly sized cuff, and averaging five to seven consecutive readings while discarding the first. Home measurement is rarely practical for owners, so screening happens at the clinic or during a house-call visit.
How is high blood pressure treated in cats?
Amlodipine, a calcium channel blocker given as a small daily tablet, is the usual first-line drug and works well in most cats. Telmisartan is another option, particularly with protein-losing kidney disease. The vet also treats the underlying cause, such as hyperthyroidism or CKD, and rechecks pressure after starting or changing medication. Treated cats usually need pressure checks every three months or so for life.
How often should a senior cat have blood pressure checked?
Guidelines suggest at least yearly checks for cats 9 to 10 years and older, and every 6 months for geriatric cats or any cat with chronic kidney disease, hyperthyroidism, or heart disease. Cats already on blood pressure medication are typically rechecked one to two weeks after a dose change and every three months once stable. Ask for a measurement at every senior wellness visit; it takes only minutes.
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