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  • Title: A comparison of clinical characteristics and long-term prognosis in asymptomatic and symptomatic patients with first-diagnosed atrial fibrillation: the Belgrade Atrial Fibrillation Study.
    Author: Potpara TS, Polovina MM, Marinkovic JM, Lip GY.
    Journal: Int J Cardiol; 2013 Oct 12; 168(5):4744-9. PubMed ID: 23958417.
    Abstract:
    BACKGROUND: To investigate baseline characteristics and long-term prognosis of carefully characterized asymptomatic and symptomatic patients with atrial fibrillation (AF) in a 'real-world' cohort of first-diagnosed non-valvular AF over a 10-year follow-up period. METHODS AND RESULTS: We conducted an observational, non-interventional, and single-centre registry-based study of consecutive first-diagnosed AF patients. Of 1100 patients (mean age 52.7±12.2 years and mean follow-up 9.9±6.1 years), 146 (13.3%) had asymptomatic AF. Persistent or permanent AF, slower ventricular rate during AF (<100/min), CHA2DS2-VASc score of 0, history of diabetes mellitus and male gender were independent baseline risk factors for asymptomatic AF presentation (all p<0.01) with a good predictive ability of the multivariable model (c-statistic 0.86, p<0.001). Kaplan-Meier 10-year estimates of survival free of progression of AF (log-rank test=33.4, p<0.001) and ischemic stroke (log-rank test=6.2, p=0.013) were significantly worse for patients with asymptomatic AF compared to those with symptomatic arrhythmia. In the multivariable Cox regression analysis, intermittent asymptomatic AF was significantly associated with progression to permanent AF (Hazard Ratio 1.6; 95% CI, 1.1-2.2; p=0.009). CONCLUSIONS: In a 'real-world' setting, patients with asymptomatic presentation of their first-diagnosed AF could have different risk profile and long-term outcomes compared to those with symptomatic AF. Whether more intensive monitoring and comprehensive AF management including AF ablation at early stage following the incident episode of AF and increased quality of oral anticoagulation could alter the long-term prognosis of these patients requires further investigation.
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