Amplitude of radial snap wave (plasma)
This test measures the electrical amplitude of the radial snap wave, a transient electrical signal detected during certain cardiac diagnostic tests. It may help assess heart function or electrical activity in specific clinical contexts.
["This test evaluates a brief electrical signal in your blood plasma, useful in specialized cardiac evaluations."]
Key facts at a glance
- LOINC
- 98607-5
- Short code
- SNAP amplitude L radial n
- Synonyms
- SNAP amplitude L radial n
- Category
- chemistry
- Sample
- serum
- Container
- Red-top tube (SST)
- Units
- N/A
- Fasting
- false
- Population
- adult
- Sex
- all
- Age range
- 18–65 years
- Method
- nerve-conduction
- 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 This Test Measuring?
The radial snap wave is a rapid, transient electrical signal observed during electrophysiological studies, often linked to cardiac conduction or ventricular function. This test quantifies its amplitude, which can reflect underlying electrical activity patterns in the heart.
Why Might You Need This Test?
This test may be ordered if your healthcare provider suspects abnormal electrical activity in the heart, such as in conditions like ventricular arrhythmias, conduction disorders, or during specific cardiac diagnostic procedures (e.g., electrophysiology studies).
How Is the Sample Collected?
A blood sample is drawn from a vein, typically in the arm. Plasma is separated from the blood cells and sent to the lab for analysis. This process is similar to other routine blood tests.
What Does the Result Mean?
Results are qualitative (qualitative assessment of signal amplitude) and interpreted by a healthcare provider based on clinical context, patient symptoms, and other diagnostic findings. Abnormal results may indicate irregular electrical activity requiring further evaluation.
Clinical interpretation
How abnormal results are interpreted and what conditions they suggest.
Clinical Significance: This test is not routinely used for general health screening. It is reserved for specialized cardiac evaluations when electrical wave patterns in the heart are suspected to be abnormal. Results help guide decisions about further testing or treatment for conditions like arrhythmias or conduction disorders.
Short name
Radial Snap Amplitude (Plasma)
Frequently asked questions
Will this test hurt?
How long will it take to get my results?
Can I eat or drink before this test?
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