Adherence to the ABC pathway improves prognosis in patients with AF: preliminary findings from an updated meta-analysis of 360,000 patients

Abstract Background With the increasing complexity of patients with Atrial Fibrillation (AF), the ‘Atrial Fibrillation Better Care’ (ABC) pathway was proposed to streamline a holistic approach for the comprehensive management of patients with AF. The ABC pathway is based on three main pillars: ‘A’ Avoid stroke (through optimal anticoagulant use); ‘B’ Better symptom control; and ‘C’ Cardiovascular and Comorbidity management optimization. Such a holistic and integrated approach is currently recommended by international guidelines, including the ones from the European Society of Cardiology (ESC); a previous meta-analysis showed sub-optimal adherence to such approach in real-world cohorts, with an overall reduction in the risk of major outcomes in patients treated according to the ABC pathway. We hereby performed an updated systematic review and meta-analysis of the current evidence on the implementation of the ABC pathway in patients with AF. Methods We performed a systematic review and meta-analysis according to PRISMA Guidelines. MEDLINE and EMBASE were searched for all studies reporting data on the prevalence of ABC pathway adherent management in patients with AF, and/or the association between ABC pathway management and the incidence of major outcomes, including all-cause death, cardiovascular death, thromboembolism, and major bleeding. Data on the prevalence of ABC pathway management were pooled using a generalized linear mixed model; number of events and total number of patients were pooled using a random-effect model. Pooled estimates were reported as odds ratios (OR) and 95% Confidence Intervals (95%CI); heterogeneity was estimated using the restricted maximum-likelihood estimator, and the Inconsistency index (I2) was also reported. Results 4,059 articles were retrieved from the literature search; after duplicates removal, title and abstract screening and full-text evaluation, 16 studies were included, for a total of more than 360,000 patients. Pooled prevalence of adherence to the ABC pathway was 28.5% (95%CI: 21.1-37.3%, I2=100%; Figure 1). Adherence to the ABC pathway was associated with a significant lower risk of all-cause death (pooled OR: 0.47, 95%CI: 0.40-0.56, I2=97%), cardiovascular death (pooled OR: 0.43, 95%CI: 0.33-0.56, I2=95%) and stroke (pooled OR: 0.61, 95%CI: 0.47-0.79, I2=91%; Figure 1). Patients treated adherent to the ABC pathway also showed a lower risk of major bleeding (pooled OR: 0.77, 95%CI: 0.66-0.90, I2=85%). Conclusions In this updated systematic review and meta-analysis, adherence to the ABC pathway was found in less than one-third of patients with AF. Implementation of the ABC pathway was associated with lower risk of all major adverse events in patients with AF, including all-cause death, and thromboembolic and bleeding events. These data further reinforce the need for routine implementation of the ABC pathway for the management of AF in clinical practice.Figure 1