Angiotensin II (measured via plasma concentration using immunoassay)
This test measures the level of angiotensin II, a hormone involved in regulating blood pressure and fluid balance in your body.
["Angiotensin II helps control how much blood your heart pumps and the resistance in your blood vessels, affecting your blood pressure."]
Key facts at a glance
- LOINC
- 73326-1
- Short code
- Irbesartan+HTCZ ind plt IgM SerPl Ql FC
- Synonyms
- Irbesartan+HTCZ ind plt IgM SerPl Ql FC
- Category
- hematology
- Sample
- serum
- Container
- Red-top tube (SST)
- Units
- N/A
- Fasting
- false
- Population
- adult
- Sex
- all
- Age range
- 18–65 years
- Method
- flow-cytometry
- CPT
- 82784
- 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
What Is Angiotensin II?
Angiotensin II is a potent vasoconstrictor, meaning it narrows blood vessels to increase blood pressure. It also stimulates the release of aldosterone, a hormone that helps retain sodium and water in your body, further influencing blood volume and pressure.
Why Might You Need This Test?
Your doctor may order this test to evaluate your response to medications like angiotensin-converting enzyme (ACE) inhibitors or angiotensin receptor blockers (ARBs), which work by blocking angiotensin II’s effects. It can also help assess conditions affecting blood pressure regulation, such as kidney disease or heart failure.
How Is This Test Performed?
A blood sample is taken from a vein, usually in your arm. The blood is then processed to separate plasma, where angiotensin II levels are measured using an immunoassay method, which detects specific proteins in the sample.
What Does the Result Mean?
Results are not typically provided as absolute numbers in this context, as angiotensin II levels vary based on medications, hydration status, and other factors. Your doctor will interpret the result in relation to your medical history and treatment goals.
Clinical interpretation
How abnormal results are interpreted and what conditions they suggest.
High levels of angiotensin II may indicate poor control of blood pressure or resistance to medications designed to block its effects. Low levels could suggest over-treatment with ACE inhibitors or ARBs, but this is less common. Monitoring angiotensin II helps optimize therapy for conditions like hypertension or heart disease.
Short name
Angiotensin II Level
Frequently asked questions
What does a high angiotensin II level mean?
How does angiotensin II relate to my blood pressure medications?
Can diet or lifestyle changes affect angiotensin II levels?
Sources
- 1
- 2Lab Tests OnlineSource
- 3
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.
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