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KCNQ1 Gene Mutation Test (Blood)

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

This test checks for specific changes (mutations) in the KCNQ1 gene, which may be linked to certain heart rhythm disorders or other genetic conditions.

Quick summary

["This test helps identify genetic variations that could affect heart function or other health risks."]

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

Key facts at a glance

LOINC
44608-8
Short code
KCNQ1 gene Mut Tested Bld/T
Synonyms
KCNQ1 gene Mut Tested Bld/T
Category
chemistry
Sample
whole-blood
Container
Lavender-top (EDTA)
Units
N/A
Fasting
false
Population
adult
Sex
all
Age range
18–65 years
Method
molgen
Specimen volume
3 mL
Stability
Room temperature: 4h, Refrigerated: 24h
Hemolysis max
0
Lipemia max
0
Icterus max
0
TAT
4–24 hours
Order
routine

Why This Test Might Be Ordered

Your healthcare provider may recommend this test if you have a family history of heart rhythm problems (e.g., long QT syndrome), unexplained fainting, or other genetic concerns. It may also be part of prenatal testing or genetic counseling for certain conditions.

What to Expect Before the Test

No special preparation is needed. You’ll provide a blood sample, usually drawn from a vein in your arm. The process is quick and typically painless.

What the Test Results Mean

Results can be positive (mutation detected), negative (no mutation found), or inconclusive (needs further evaluation). A healthcare provider will interpret results in the context of your medical history and family background.

Common Conditions Linked to KCNQ1 Mutations

Mutations in the KCNQ1 gene are associated with long QT syndrome, a condition that can cause abnormal heart rhythms and increase the risk of sudden cardiac events. It may also be linked to other rare genetic disorders.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

◆Associated findings1

Short name

KCNQ1 Mutation Screening

Frequently asked questions

Will this test affect my insurance or coverage?
Genetic testing results are confidential and protected under privacy laws. Insurance coverage depends on your plan and reason for testing. Always confirm with your insurer before proceeding.
How long will I need to wait for results?
Results are typically available within 2–4 weeks, but timing varies. Your healthcare provider will discuss next steps based on findings.
Can I get this test if I’m pregnant?
Yes, this test can be performed during pregnancy if recommended by a genetic counselor or obstetrician, especially if there’s a family history of genetic heart conditions.
  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