Key result
RYR2 missense variants linked to ~12-fold greater ventricular arrhythmia risk vs wild-type relatives.
Why the study?
Pathogenicity and penetrance of RYR2 missense variants remain uncertain in next-generation sequencing, and the impact of additional coexisting variants on clinical severity is poorly defined.
Does the presence of RYR2 missense variants and additional coexisting variants increase the risk of adverse cardiovascular events compared to wild-type relatives?
Cohort (n=79)
Does the presence of RYR2 missense variants and additional coexisting variants increase the risk of adverse cardiovascular events compared to wild-type relatives?
Hazard Ratio: 12.1 (95% CI 3.05–44.1)
Absolute Event Rate: 34% vs 0%
p-value: p=0.002
RYR2 missense variants are associated with a high burden of adverse cardiovascular events, and the presence of additional variants further amplifies this risk, highlighting the need for extensive genotype-guided risk stratification.
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Supports intensified arrhythmia surveillance in RYR2 carriers; extends observational data but leaves prospective validation open.
Calburean et al. (2026) conducted a cohort in RYR2 missense variant carriers (n=79). RYR2 missense variant vs. Wild-type RYR2 was evaluated on Ventricular arrhythmias (HR 12.1, 95% CI 3.05-44.1, p=0.002). RYR2 missense variants were strongly associated with ventricular arrhythmias compared to wild-type relatives (HR 12.1; 95% CI 3.05-44.1; p=0.002).
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