ArticleJACC. Case reports2025
Congestive Heart Failure as Initial Manifestation of Biventricular Arrhythmogenic Cardiomyopathy With MYBPC3 and DSG2 Variants.
Article in JACC. Case reports, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
backgroundArrhythmogenic cardiomyopathy (ACM) is typically linked to variants in desmosomal genes (eg, DSG2), whereas MYBPC3 variants are associated with hypertrophic cardiomyopathy. Concurrent variants from both pathways are rare and poorly characterized. CASE SUMMARY: A 35-year-old man who presented with congestive heart failure fulfilled the criteria for biventricular ACM. Genetic analysis identified 3 heterozygous variants, in DSG2 (c.136C>T, p.Arg46Trp and c.806T>C, p.Ile269Thr) and MYBPC3 (c.529C>T, p.Arg177Cys; variant of uncertain significance). The patient was treated with guideline-directed therapy, remained clinically stable with reduced premature ventricular complex burden and improved biventricular function on cardiac magnetic resonance, and was listed for heart transplantation. DISCUSSION: Concurrent DSG2 and MYBPC3 variants represent an uncommon genetic profile in ACM, contributing to variable phenotype and adverse outcomes. This case highlights the value of genetic testing combined with advanced imaging in refining the characterization of inherited cardiomyopathies. TAKE-HOME MESSAGES: Concurrent genetic variants may influence phenotype and prognosis. Comprehensive testing and longitudinal follow-up are essential for risk stratification and personalized care.
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