Atrial high-rate episodes (AHRE) detected in patients with cardiac implantable electronic devices (CIEDs) may carry significant prognostic implications. A systematic review and meta-analysis of 15 cohort studies, published in the Journal of Cardiology, assessed the relationship between AHRE and mortality outcomes in patients without a prior history of atrial fibrillation at device implantation.

The pooled analysis demonstrated that AHRE increased the risk of all-cause mortality by 57% (RR 1.57; 95% CI 1.21–2.03; p < 0.001) and cardiovascular mortality by 80% (RR 1.80; 95% CI 1.06–3.05; p = 0.03) compared to patients without AHRE. The findings reinforce the need for closer monitoring and proactive management in patients with device-detected AHRE, even in the absence of clinical atrial fibrillation.

The study highlights AHRE monitoring as a key component of risk stratification in CIED patients. However, further investigation is required to determine strategies that may prevent AHRE progression to clinical atrial fibrillation and reduce associated mortality.