Smart protocols
Working through a patient now?
Keep reading if you need the guide. For a patient-specific pathway, enter the species, weight, systolic blood pressure, target organ findings, measurement quality, and confirmation status in Vetool. The protocol sorts the risk and shows the relevant next step.
Start with the measurement
A high clinic reading may reflect sustained hypertension, but stress, restraint, cuff selection, movement, and technique can all change the result.
- Allow 5 to 10 minutes for acclimatization in a quiet room, away from other animals.
- Use gentle restraint and keep the patient calm and still.
- Choose a cuff with a width about 30% to 40% of the measurement site circumference.
- Discard the first measurement.
- Record 5 to 7 consecutive, consistent readings and calculate their mean.
If the readings vary substantially or the patient becomes more stressed, stop and correct the measurement conditions before making a clinical decision.
Step 1: place the SBP in context
The Vetool protocol uses the ACVIM and IRIS systolic blood pressure categories for dogs and cats. Each category estimates the risk of target organ damage.
| Systolic blood pressure | Category | Risk of target organ damage |
|---|---|---|
| Below 140 mmHg | Normotensive | Minimal |
| 140 to 159 mmHg | Prehypertensive | Low |
| 160 to 179 mmHg | Hypertensive | Moderate |
| 180 mmHg or higher | Severely hypertensive | High |
The category describes risk. Measurement quality, target organ damage, persistence, and the rest of the clinical picture determine what happens next.
Step 2: check for target organ damage
Sustained hypertension can injure the eyes, brain, kidneys, heart, and blood vessels. Look for findings that fit hypertensive injury.
Eyes
Retinal hemorrhage or edema, retinal detachment, acute blindness or other visual change, hyphema, papilledema, or secondary glaucoma.
Brain
Seizures, altered mentation or behavior, disorientation, vestibular signs, balance disturbance, or a focal neurologic deficit.
Kidneys
Persistent proteinuria or evidence of progressive kidney injury, including serial changes in creatinine, SDMA, or GFR.
Heart and blood vessels
Left ventricular concentric hypertrophy, a gallop sound, arrhythmia, systolic murmur, or another compatible cardiovascular finding.
Interpret each finding in the full clinical context. Compatible target organ damage can shorten the time available for confirmation.
Step 3: decide whether to repeat or act
Two patients with the same SBP can need different next steps. Use measurement quality, target organ damage, and persistence together.
Reliable SBP with compatible target organ damage
ACVIM guidance says target organ damage can justify treatment after one measurement session. ISFM is more specific for cats: one careful reading of at least 150 mmHg may justify treatment when there is clear ocular or neurologic damage, while cardiac or kidney damage with SBP of at least 160 mmHg should be documented on at least two occasions. Apply the finding to the individual patient and do not delay urgent care solely to collect more readings.
SBP 160 to 179 mmHg without target organ damage
Confirm that the increase persists and that situational hypertension or measurement error is not responsible. ACVIM generally calls for measurements on more than two occasions and allows those repeat sessions to occur over 4 to 8 weeks for this group.
SBP 180 mmHg or higher without target organ damage
Persistence still matters, but the risk is higher. ACVIM recommends completing the repeat measurement sessions within 1 to 2 weeks.
Questionable measurement quality
Return to the measurement protocol. A very high value needs attention, but a decision should not rest on a reading you cannot trust.
Same SBP, different decision
Consider two cats with an SBP of 175 mmHg.
Cat 1
The first cat has retinal lesions compatible with hypertensive injury.
Cat 2
The second has no evidence of target organ damage, and the first high reading was recorded during a stressful visit.
The number is identical, but the evidence around it is not. That difference changes the next step.
Step 4: look for what may be driving it
Once persistent hypertension is established and situational hypertension is unlikely, assess for disease, medication, or toxin exposure that may be contributing.
Kidney and endocrine disease belong in that assessment. Select further tests from the patient's history, examination, and initial laboratory findings. Treating an associated condition does not remove the need to follow the blood pressure and target organ risk, because hypertension can persist after the underlying condition is treated.
Common traps
Most errors happen when one part of the assessment replaces the rest of it.
Treating the number
An SBP category estimates risk. It cannot replace measurement quality, target organ assessment, confirmation, and clinical context.
Missing target organ damage
Target organ damage can change the pace of the case. Check for it before deciding that another routine BP measurement is enough.
Treating one high clinic reading
Without target organ damage, an isolated increase may reflect situational hypertension. Confirm persistence before turning one measurement into a long-term treatment plan.
Ready to apply the pathway to a patient?
Enter the species, weight, SBP, target organ findings, measurement quality, and confirmation status in Vetool. The Hypertension Protocol follows the relevant branch and brings the next steps into one workflow.
References
- Acierno MJ, Brown S, Coleman AE, et al. ACVIM consensus statement: Guidelines for the identification, evaluation, and management of systemic hypertension in dogs and cats. Journal of Veterinary Internal Medicine. 2018. doi:10.1111/jvim.15331. Read the ACVIM consensus statement
- Taylor SS, Sparkes AH, Briscoe K, et al. ISFM Consensus Guidelines on the Diagnosis and Management of Hypertension in Cats. Journal of Feline Medicine and Surgery. 2017. doi:10.1177/1098612X17693500. Read the ISFM guidelines
Disclaimer
For veterinary professional education and workflow support only. This guide does not diagnose hypertension or replace patient-specific assessment, clinical judgment, careful blood pressure measurement, current clinical guidance, product labeling, local regulations, or referral when indicated. The attending veterinary professional must confirm treatment selection, dosing, monitoring, and adjustment for the individual patient.