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Maximum Systolic Blood Pressure (Measured via Arterial Catheter)

Published: August 9, 2026Updated: August 16, 2026

This test measures the highest pressure in your arteries when your heart pumps blood out during each heartbeat. It’s typically done through a catheter placed in an artery, often in a hospital setting.

Quick summary

["This test helps doctors assess your blood pressure and identify potential cardiovascular risks."]

Medically reviewed by WellAlly Editorial TeamLast reviewed August 16, 2026Editorial policy

Key facts at a glance

LOINC
11726-7
Short code
Circ sys Vmax sys DOP
Synonyms
Circ sys Vmax sys DOP
Category
chemistry
Sample
serum
Container
Red-top tube (SST)
Units
N/A
Fasting
false
Population
adult
Sex
all
Age range
18–65 years
Method
us-doppler
Specimen volume
5 mL
Stability
Room temperature: 4h, Refrigerated: 24h, Frozen: 7d
Hemolysis max
500
Lipemia max
1000
Icterus max
500
TAT
4–24 hours
Order
routine

Why This Test Is Done

Your doctor may order this test if they suspect high blood pressure (hypertension), heart disease, or other conditions affecting blood flow. It can also be part of monitoring for chronic health conditions like kidney disease or heart failure.

What to Expect Before the Test

You’ll likely be admitted to the hospital for this procedure. A healthcare provider will insert a thin tube (catheter) into an artery, usually in your arm or wrist, under local anesthesia. Blood pressure readings are taken continuously while you rest.

What Happens During the Test

The catheter is connected to a machine that measures blood pressure in real time. You’ll remain awake and alert, and the process usually takes a few minutes to an hour, depending on the procedure’s complexity.

Aftercare and Recovery

After the test, you’ll be monitored closely for any complications. You may need to stay in the hospital for a short time, and your doctor will guide you on activity restrictions and follow-up care.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

High systolic blood pressure can strain your heart and blood vessels over time, increasing the risk of heart disease, stroke, or kidney problems. This test helps doctors diagnose hypertension or evaluate its impact on your cardiovascular health.

Frequently asked questions

What does a high or low systolic blood pressure mean?
A high systolic reading may indicate hypertension or other cardiovascular conditions, while a very low reading could suggest issues like shock or severe dehydration. Your doctor will interpret results in the context of your overall health.
How often should I get this test?
This test is typically done as part of a specific medical evaluation rather than a routine screening. Your doctor will determine if and when you need it based on your symptoms or health needs.
Can I eat or drink before this test?
Most likely, you’ll need to fast or avoid certain foods/drinks before the procedure, depending on the hospital’s protocol. Always follow your doctor’s instructions to ensure accurate results.
  1. 1
    MedlinePlus — Laboratory TestsSource
  2. 2
    Lab Tests OnlineSource
  3. 3
    Mayo Clinic — Tests & ProceduresSource

Click any link to access the full source. PubMed Central (PMC) links provide free full-text access.

This information is for educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment.

Medical Disclaimer

This content is for general informational and educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment. Always seek the guidance of a qualified healthcare provider with any questions you have about a medical condition, and never disregard professional medical advice or delay seeking it because of something you read here.

If you think you may have a medical emergency, call your local emergency number or go to the nearest emergency department immediately.

Medically reviewed by WellAlly Editorial Team Last reviewed August 16, 2026. · Read our editorial policy