Truncating Variants and Human Cardiomyopathy
JAMA Cardiology 10.1001/jamacardio.2026.0401April 08, 2026 at 11:00 AM EDT
What is the contribution of truncating variants (tvs) to arrhythmogenic dilated cardiomyopathy (DCM)?In this cohort study including 4249 participants in UK Biobank and 179 in the RBM20 registry, tvs displayed overall low penetrance compared to a more common genetic cause of DCM (titin truncating variants) in large population biobanks. Patients with DCM and tvs had a milder lifetime disease course than those with known disease-causing variants in .These observations suggest that tvs be viewed clinically as low-effect contributors to arrhythmogenic DCM.
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