LAUSR

Sustained atrial high-rate episodes (SAHREs) (lasting >24h) was associated with unfavorable pragnosis. To evaluate the performance of the C2HEST score in assessing individuals' risk of SAHRE. The West Birminghan Atrial Fibrillation (AF) Project included 500 consecutive non-AF patients with implantable cardiac electronic device. The role of the C2HEST score for SAHRE risk stratification was evaluated. SAHRE was detected in 8.8% of patients (2.09%/year, 95% CI 1.47–2.71) over a mean 4.4 years of follow-up. SAHRE was associated with increased all-cause mortality (P<0.001). The risk of SAHRE increased by C2HEST score (39% higher risk per point increase). The C2HEST score had moderate predictive capability (c-index 0.706 [0.615–0.798], log-rank P=0.003) for SAHRE, which was better than other clinical scores (CHA2DS2-VASc, CHADS2, HATCH). The C2HEST score was predictive of SAHRE, which may help to identify at-risk subjects who may need intensive device review. Central Illustration Type of funding source: None