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July 23, 2026Open Access

TTN variants are linked to ~10-fold higher cardiomyopathy risk in young AF patients.

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Population

Patients with early-onset atrial fibrillation

Design

Review

Key result

Pathogenic variants in cardiomyopathy genes are found in 5-20% of young AF patients, with TTN variants conferring up to a twofold increased risk of AF and a tenfold higher risk of cardiomyopathy.

Authors

HPHarris PapadopoulouEMEric A. Miska

Discussion

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Overview

May prompt genetic testing in early-onset AF; leaves open effects on management and outcomes.

Key Points

  • This review aims to explore the link between cardiomyopathy gene variants and early-onset atrial fibrillation.
  • Synthesis of evidence from multiple sequencing cohorts identifying gene variants in young AF patients.
  • Focus on variants in TTN, LMNA, MYH7, and PKP2.
  • Evaluation of risks associated with identified genetic variants.
  • Pathogenic variants in cardiomyopathy genes found in 5-20% of young AF patients.
  • TTN truncating variants linked to a twofold increased risk of AF and tenfold higher risk of dilated cardiomyopathy.
  • Genotype-positive AF patients show higher risks of heart failure, sudden cardiac death, and progression to cardiomyopathy.

Structured PICO

P
Population
Patients with early-onset atrial fibrillation (often before 65 years of age, especially ≤45 years, in the absence of structural heart disease)

Early-onset atrial fibrillation may serve as a sentinel manifestation of inherited cardiomyopathy, highlighting the potential value of genetic testing in young AF patients to guide personalized surveillance and management.

Cite This Study

Papadopoulou et al. (2026) conducted a review in Early-onset Atrial Fibrillation. Cardiomyopathy gene variants (e.g., TTN, LMNA, MYH7, PKP2) was evaluated. Pathogenic variants in cardiomyopathy genes are found in 5-20% of young AF patients, with TTN variants conferring up to a twofold increased risk of AF and a tenfold higher risk of cardiomyopathy.

synapsesocial.com/papers/6a61b056faa9903c5116ae95https://doi.org/10.17863/cam.132517
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Also Consider

Synapse has enriched 5 closely related papers on similar clinical questions. Consider them for comparative context:

  1. 1A Review of Cardiomyopathy Gene Variants as Drivers of Early-Onset Atrial Fibrillation: Linking Genotype to Phenotype in Precision Medicine2026
  2. 2Early onset atrial fibrillation as a marker of inherited cardiomyopathy: lessons from combined imaging and genetic assessment2026
  3. 3Genetic evaluation of early-onset atrial fibrillation: impact on patient management2025
  4. 4Age-Dependent Contributions of Rare and Common Genetic Variation in Atrial Fibrillation2025
  5. 5Beyond Tachycardia-Induced Cardiomyopathy2025