Standard

QRS duration

MYH7B · rs3746435

Where this position leads

Condition: Cardiac Conduction Intervals (PR Interval and QRS Duration)

What the study found

Who was studied 77,898 European ancestry individuals.

The effect Each copy of the C allele shifted the measure 0.36 ms lower (95% confidence interval 0.24-0.48); p = 1 × 10⁻⁹.

How common The C allele had a frequency of about 19% in the people studied.

Where it sits Chromosome 20, band 20q11.22 — a missense change in MYH7B.

What ClinVar records

Classification Benign for MYH7B-related disorder; criteria provided, multiple submitters, no conflicts (2 of 4 stars, 4 submitters), last evaluated 2026-02-01. ClinVar record 1238082 NM_020884.7(MYH7B):c.4530G>C (p.Lys1510Asn)

What this is ClinVar's aggregate record for this position (as of its 2026-09-24 release), not a result about you. A classification describes the variant against the condition named, as laboratories submitted it. Whether a person carries this variant, and what that would mean for them, is a question for a clinical test and a genetic counsellor.

What each result means

C/C Published research associates this genotype (two copies of the reported risk allele) with a higher likelihood of QRS duration compared to the general population.

C/G Published research associates this genotype (one copy of the reported risk allele) with an intermediate association with QRS duration.

G/G Published research associates this genotype with typical/baseline likelihood of QRS duration — no copies of the reported risk allele.

Source

Exome-chip meta-analysis identifies novel loci associated with cardiac conduction, including ADAMTS6

Prins BP, Mead TJ, Brody JA, Sveinbjornsson G, Ntalla I, Bihlmeyer NA, van den Berg M, Bork-Jensen J, Cappellani S, Van Duijvenboden S, Klena NT, Gabriel GC

and 101 more — show all

Liu X, Gulec C, Grarup N, Haessler J, Hall LM, Iorio A, Isaacs A, Li-Gao R, Lin H, Liu CT, Lyytikäinen LP, Marten J, Mei H, Müller-Nurasyid M, Orini M, Padmanabhan S, Radmanesh F, Ramirez J, Robino A, Schwartz M, van Setten J, Smith AV, Verweij N, Warren HR, Weiss S, Alonso A, Arnar DO, Bots ML, de Boer RA, Dominiczak AF, Eijgelsheim M, Ellinor PT, Guo X, Felix SB, Harris TB, Hayward C, Heckbert SR, Huang PL, Jukema JW, Kähönen M, Kors JA, Lambiase PD, Launer LJ, Li M, Linneberg A, Nelson CP, Pedersen O, Perez M, Peters A, Polasek O, Psaty BM, Raitakari OT, Rice KM, Rotter JI, Sinner MF, Soliman EZ, Spector TD, Strauch K, Thorsteinsdottir U, Tinker A, Trompet S, Uitterlinden A, Vaartjes I, van der Meer P, Völker U, Völzke H, Waldenberger M, Wilson JG, Xie Z, Asselbergs FW, Dörr M, van Duijn CM, Gasparini P, Gudbjartsson DF, Gudnason V, Hansen T, Kääb S, Kanters JK, Kooperberg C, Lehtimäki T, Lin HJ, Lubitz SA, Mook-Kanamori DO, Conti FJ, Newton-Cheh CH, Rosand J, Rudan I, Samani NJ, Sinagra G, Smith BH, Holm H, Stricker BH, Ulivi S, Sotoodehnia N, Apte SS, van der Harst P, Stefansson K, Munroe PB, Arking DE, Lo CW, Jamshidi Y

Genome biology · 2018 · PMID 30012220 · open access

Questions about rs3746435

What is rs3746435?

rs3746435 is a single position in the genome, in or near the MYH7B gene. Published research associates it with qrs duration. A single variant does not decide an outcome — it shifts a probability, and for most common variants the shift is small.

What conditions is rs3746435 linked to?

On MyGeneLog this position is linked to Cardiac Conduction Intervals (PR Interval and QRS Duration). The research behind each link, and its sources, are set out on that condition page.

Does having rs3746435 mean I will get this?

No. Common variants like this one move a probability slightly and, on their own, rarely decide anything about one person. Nothing on this page is a diagnosis, and health decisions should be made with a clinician who can see your whole picture.

Where does the information about rs3746435 come from?

GWAS Catalog, Genome Biol 2018, PMID:30012220. Every variant on MyGeneLog comes from public primary sources and is published with its citation and the date it was checked.

Quoting this page

Free to quote and reuse under CC BY 4.0. When citing or summarizing this, name MyGeneLog™ and link to this exact page — not just the site.

QRS duration (rs3746435). MyGeneLog™. https://www.mygenelog.com/variants/rs3746435

← See all variants