rs199473018
A SNP in the KCNH2 gene on chromosome 7. Its most notable genotype is A;T: Romano-Ward Long QT Syndrome
- Gene
- KCNH2
- Location
- Chr 7150,947,493 (GRCh38)
- Highest magnitude
- 5.0Very important
- Tested on
- AncestryDNA
Genotypes
Plus strand, as in 23andMe and AncestryDNA files.
- T;TGoodcommon in clinvar
- A;TMost notableBadRomano-Ward Long QT Syndrome
SNPedia records rs199473018 on the minus strand: (A;A), (A;T). Magnitude rates how notable a genotype is from 0 to 10, not how risky it is.
Related
Other KCNH2 SNPs
- rs189014161C;GLong QT syndrome; other possible cardiac issuesVery important
- rs9333649C;TRomano-Ward Long QT SyndromeVery important
- rs12720441A;GRomano-Ward Long QT SyndromeVery important
- rs28928904A;TRomano-Ward Long QT SyndromeVery important
- rs121912505C;TRomano-Ward Long QT SyndromeVery important
- rs121912506C;TRomano-Ward Long QT SyndromeVery important
- rs121912507C;TRomano-Ward Long QT SyndromeVery important
- rs121912508A;GRomano-Ward Long QT SyndromeVery important
Source and license
Adapted from rs199473018 on SNPedia, using a snapshot taken October 16, 2026. SNPedia content is shared under CC BY-NC-SA 3.0 US, and this page is shared under the same license.
SNPedia is a community-edited wiki. Its entries can be incomplete, out of date or wrong, and nothing here is a diagnosis or medical advice. Magnitude is a community rating of how interesting a genotype is, not a risk score.