Association of Common Ancestry-Enriched Variants With Cardiomyopathy and Arrhythmias: Insights From Genetic Studies in Individuals of African Ancestry
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Association of Common Ancestry-Enriched Variants With Cardiomyopathy and Arrhythmias: Insights From Genetic Studies in Individuals of African Ancestry

Genetic variants enriched in individuals of African ancestry confer increased risk of cardiomyopathy and arrhythmias, with cardiovascular risk factors amplifying this risk. Large biobank studies enable reclassification of key variants and highlight the need for ancestry-specific genetic risk assessment.
LMNA Variant Type and Location Shape Arrhythmic Risk in Cardiomyopathy: Truncations Confer Higher VA Risk; Tail-domain Missense Variants Appear Lower Risk
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LMNA Variant Type and Location Shape Arrhythmic Risk in Cardiomyopathy: Truncations Confer Higher VA Risk; Tail-domain Missense Variants Appear Lower Risk

In 718 patients with pathogenic/likely pathogenic LMNA variants, truncating variants carried higher risk of malignant ventricular arrhythmia independent of position, while missense variants in the tail domain and exons 7–12 had lower arrhythmic and heart-failure events, suggesting genotype-location refines risk stratification.
Shared Genetic Vulnerability: Polygenic and Monogenic Contributions to Peripartum, Alcohol-Induced, and Cancer Therapy–Related Cardiomyopathies
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Shared Genetic Vulnerability: Polygenic and Monogenic Contributions to Peripartum, Alcohol-Induced, and Cancer Therapy–Related Cardiomyopathies

A large multi-cohort genetic analysis shows that both rare monogenic variants and a high polygenic score for dilated cardiomyopathy (DCM) are enriched in peripartum, alcohol-induced, and cancer therapy–related cardiomyopathies, supporting a shared genetic susceptibility unmasked by diverse environmental stressors.
High Early Risk of Sudden Cardiac Arrest in Newly Diagnosed Cardiomyopathy: Insights from the German SCD‑PROTECT Wearable Defibrillator Registry
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High Early Risk of Sudden Cardiac Arrest in Newly Diagnosed Cardiomyopathy: Insights from the German SCD‑PROTECT Wearable Defibrillator Registry

The nationwide SCD‑PROTECT study (n=19,598) found substantial early risk of sustained VT/VF in newly diagnosed ischaemic and non‑ischaemic cardiomyopathy; wearable cardioverter‑defibrillators (WCDs) delivered life‑saving therapy with low inappropriate shock rates while ~52% recovered LVEF >35% during a mean 66‑day WCD period.
Guideline‑Level Moderate–Vigorous Physical Activity Appears Safe and Beneficial for Phenotype‑Negative Car cardiomyopathy Variant Carriers
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Guideline‑Level Moderate–Vigorous Physical Activity Appears Safe and Beneficial for Phenotype‑Negative Car cardiomyopathy Variant Carriers

In a large UK Biobank cohort, accelerometer-measured moderate‑to‑vigorous physical activity (100–400 min/week) was associated with lower cardiovascular risk and no excess arrhythmic or cardiomyopathy onset among genotype‑positive phenotype‑negative (G+P-) cardiomyopathy variant carriers.