Is Atrial Fibrillation Genetic?
Atrial fibrillation (AFib) is an irregular and often rapid heart rhythm that can lead to blood clots, stroke, and heart failure. It is the most common type of cardiac arrhythmia.
Affects ~1 in 25 adults over 65.
Genetic Factors Behind Atrial Fibrillation
Research has identified multiple genetic variants that influence a person's susceptibility to Atrial Fibrillation. While no single gene determines whether someone will develop this condition, specific variants can increase or decrease risk. Key genes studied in relation to Atrial Fibrillation include:
PITX24q25KCNN3ZFHX3PITX2PITX2 has been associated with atrial fibrillation in genetic studies; as with most common variants, its individual effect is modest and works alongside many other genetic and non-genetic factors.
4q254q25 has been associated with atrial fibrillation in genetic studies; as with most common variants, its individual effect is modest and works alongside many other genetic and non-genetic factors.
KCNN3KCNN3 has been associated with atrial fibrillation in genetic studies; as with most common variants, its individual effect is modest and works alongside many other genetic and non-genetic factors.
ZFHX3ZFHX3 has been associated with atrial fibrillation in genetic studies; as with most common variants, its individual effect is modest and works alongside many other genetic and non-genetic factors.
How GenomeInsight Analyzes Your Risk
GenomeInsight examines your raw DNA data from services like 23andMe, AncestryDNA, or whole-genome sequencing (VCF files) to identify genetic variants associated with Atrial Fibrillation. The analysis is performed entirely in your browser, meaning your genetic data never leaves your device.
For each relevant variant, GenomeInsight reports your genotype, the associated risk allele, the odds ratio from published research, and your overall risk profile compared to the general population. Results are presented with easy-to-understand risk visualizations and percentile rankings.
Genetic risk is only one piece of the puzzle. Lifestyle, diet, environment, and family history all contribute to overall risk. GenomeInsight's analysis is for informational and educational purposes and is not a medical diagnosis.
Understanding Your Atrial Fibrillation Results
After uploading your DNA file, you will receive a detailed health risk report covering 52 conditions, including Atrial Fibrillation. For each condition, GenomeInsight analyzes multiple SNPs (single nucleotide polymorphisms) and calculates a combined risk assessment.
Your results will show whether you carry risk-increasing or protective alleles in genes like PITX2, 4q25, KCNN3, and ZFHX3. Risk levels range from "Below Average" to "Significantly Increased," with population percentile comparisons to contextualize your results.
Frequently Asked Questions About Atrial Fibrillation
Which genes are linked to Atrial Fibrillation?
Atrial Fibrillation has been associated with PITX2, 4q25, KCNN3, ZFHX3 in genome-wide association studies. No single variant causes the condition — genetic susceptibility is the sum of many small effects.
If I carry risk variants, will I develop Atrial Fibrillation?
Carrying risk alleles raises probability, not certainty. Most common conditions arise from genes interacting with lifestyle and environment over decades, so a higher genetic risk score is best used as motivation for the relevant screening and prevention measures, not as a prediction.
What DNA data do I need for this analysis?
Any standard consumer-genetics raw file (23andMe, AncestryDNA, MyHeritage, FamilyTreeDNA, or VCF from sequencing) contains the relevant variants. Analysis runs locally on your device, so your genetic data stays private.
Related Conditions That Share These Genes
Variants in the same genes often influence more than one condition. These conditions overlap genetically with Atrial Fibrillation:
Sources & Further Reading
The risk associations described on this page come from published genome-wide association studies and curated public genomic databases. Explore the primary sources for each gene:
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Discover Your Atrial Fibrillation Risk Profile
Upload your 23andMe, AncestryDNA, or VCF file for a free, privacy-first genetic analysis covering Atrial Fibrillation and 51 other health conditions.
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