About 1 in 347 in US carry heart disease-linked gene variants
An observational analysis estimated 990,722 US carriers of disease-linked variants in the gene for titin, a muscle protein, using population genetic data.
Our read
Populations- Studied:
- Cross-sectional study of people represented in public genomic databases
- What changed:
- An estimated 1:347 people in the US carried disease-linked TTN variants
- The catch:
- Nationwide carrier prevalence was extrapolated from database frequencies rather than directly measured
- In the record:
- The 4th paper on TTN with results in people; 34 on record in all.
Editor of record: Boris Djordjevic · AgingResearch.News
Participants in the NIH All of Us cohort had their genetic data and medical records examined in an observational study of TTN, the gene for the muscle protein titin. Researchers also combined public genetic data with 2024 US census figures to estimate carrier numbers nationwide.
Cardiomyopathy, a disease of heart muscle, was diagnosed in 14.9% of carriers of protein-shortening variants, compared with 2.8% of noncarriers. Diagnoses and related cardiovascular codes began rising noticeably around age 40 among carriers. The authors estimated that 138,121 US carriers had or would receive a cardiomyopathy diagnosis during their lifetime. They projected that a further 243,492 would experience related cardiovascular symptoms.
Why it matters
The authors said the estimated burden of heart muscle disease highlights a need for better screening to identify people at risk as they age.
Caveats
Cardiomyopathy and potentially related conditions were identified through medical-record codes. The nationwide lifetime totals were extrapolated estimates.
The paper
Real World Estimation of the Genetic and Clinical Prevalence of TTN-DCM
Flux Therapeutics Inc.
AHA Scientific Sessions 2026 Abstract, Nov 2, 2026
Presented at AHA Scientific Sessions 2026, abstract 6787
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