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  • Title: Prognostic impact of sustained new-onset atrial fibrillation in critically ill patients.
    Author: Yoshida T, Uchino S, Sasabuchi Y, Hagiwara Y, AFTER-ICU study group.
    Journal: Intensive Care Med; 2020 Jan; 46(1):27-35. PubMed ID: 31686126.
    Abstract:
    PURPOSE: The development of new-onset atrial fibrillation (AF) in critically ill patients may be associated with poor outcomes. However, it is unknown whether sustained new-onset AF contributes to worse outcome. The aim of this study was to assess whether sustained new-onset AF is associated with stroke and death and to look for a possible dose-response relationship between AF duration and death. METHODS: In a prospective cohort study conducted in 32 intensive care units in Japan from 2017 to 2018, we enrolled adult patients with new-onset AF. We compared patients with AF duration longer than 48 h with those with AF duration shorter than 48 h. To assess a dose-response relationship between AF duration and hospital mortality, we conducted landmark analysis and time-dependent Cox regression analysis. RESULTS: Among a total of 423 new-onset AF patients, hospital mortality was 25%, and the incidence of in-hospital stroke was 4.6%. AF duration longer than 48 h was not independently associated with hospital mortality (adjusted odds ratio: 1.52; 95% Confidence Interval: 0.87-2.64). The incidence of in-hospital stroke was 7.6% in patients with AF duration longer than 48 h and 3.8% in those with AF duration shorter than 48 h (p = 0.154). When analyzing time more continuously, we observed a time-dependent association between AF duration and hospital mortality (p = 0.005 by landmark analysis and p = 0.019 by Cox analysis). CONCLUSIONS: Sustained new-onset AF was time-dependently associated with hospital mortality in ICU patients, albeit with some uncertainty since AF duration longer than 48 h was not independently associated with in-hospital death or stroke.
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