328 IMPACT OF INTEGRATED CARE WITH ABC PATHWAY IN PATIENTS WITH ATRIAL FIBRILLATION AND HEART FAILURE: DATA FROM MORE THAN 11000 PATIENTS ENROLLED IN A EUROPEAN REGISTRY

Abstract Background and aim Heart failure (HF) is closely associated with atrial fibrillation (AF). The Atrial fibrillation Better Care (ABC) pathway is recommended in guidelines as a holistic or integrated care approach to AF management. However, few data are specifically available on ABC pathway adherence in AF patients with HF, especially according to HF phenotypes. Therefore, we aimed to retrospectively investigate the effect of ABC management in a large contemporary cohort of AF patients with HF and the impact on the clinical outcomes. Methods We analyzed patients enrolled in the ESC-EHRA EORP-AF General Long-Term Registry. According to the availability of HF status and ejection fraction (EF) values, patients were categorized as follows: i) non-HF; ii) HF EF>40% iii) HF EF≤40%. The primary outcome was a composite outcome of all-cause death and major adverse cardiac events. Results Among the original 11 096 AF patients enrolled, 9175 (82.7%) were included in this analysis (median age 71 years, interquartile range [IQR 63-77], 40.1% were female, with median EF 55% [IQR 45-61%] and median CHA2DS2-VASc 3 [2-4]). In this cohort, 5935 (64.7%) were non-HF patients, and 3240 (35.3%) had HF patients. According to the EF values, 2005 (65%) were categorized as HF EF>40%, and 1235 (35%) were HF EF≤40%. Overall, ABC pathway adherence in HF patients was 23.3% [95% CI: 21.6-25.2], being higher in HF EF≤40% patients (28.0%) and lower in HF EF>40% ones (21.9%). After a median follow-up of 731[IQR 690-748] days, ABC adherence was associated with a lower risk for the composite outcome compared to non-ABC adherent patients in each HF group (HF EF>40%: ABC 15.4% vs no ABC 20.9%; HF EF≤40%: ABC 20.3% vs no ABC 33.9%; both p<0.001). Cox regression analysis showed that ABC adherence was associated with a lower risk of composite outcome in each HF category (HF EF>40%: HR 0.66 [95% CI: 0.46-0.96], p=0.030; HF EF≤40%: HR 0.60 [95% CI: 0.40-0.90], p=0.013). ABC adherence was associated with a consistent risk reduction for the composite outcome across the entire EF spectrum [Figure]. Conclusions In this large contemporary cohort of AF-HF patients, adherence to the ABC pathway was associated with a lower occurrence of the primary outcome, irrespective of baseline EF. ABC pathway is consistently associated with a lower risk for adverse outcomes across the entire spectrum of EF.