Abstract
BACKGROUND: New type of arrhythmia called atrial high-rate episodes (AHREs) has been discovered thanks to the ability of cardiac electronic implantable devices to track, record, and analyze complex arrhythmias. The aim is to determine factors associated with AHRE in HFrEF/CRT patients and the effect of AHRE on functional capacity and quality of life (QoL). RESULTS: We interrogated 100 patients' devices to gauge the incidence and burden of AHRE, then assessed their functional capacity using the standard 6-min walk test (6MWT), and evaluated their QoL using the Minnesota Living with HF questionnaire (MLHFQ) score. 34% of patients had AHRE, and 91.2% of them had AF. By multivariate logistic regression analysis, smoking (OR 9.426, 95% CI [1.33, 66.65], P 0.025), higher BMI (OR 1.336, 95% CI [1.09, 1.635], P 0.005), and increased LAVI (OR 1.16, 95% CI [1.063, 1.262], P < 0.001) are independent predictors for AHRE. There was a significant correlation between AHRE and the distance walked during 6MWT when compared to the distance expected for an equivalent healthy individual (82.02 ± 17.22% in the non-AHRE group vs. 75.15 ± 15.78% in the AHRE group, P < 0.001). It was found that AHRE was statistically linked to a higher total MLHFQ score (46.76 ± 9.82 in the AHRE group vs. 36.97 ± 7.76 in the non-AHRE group, P 0.032), with higher physical scores in the AHRE group. CONCLUSION: AHRE significantly reduces functional status and perceived quality of life in HFrEF patients receiving CRT. Longer than five minutes of AHRE was associated with a higher MLHFQ score and worse performance on the 6MWT. In that patient population, smoking, obesity, and elevated LAVI were independent predictors of AHRE.