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  • Title: Incidence, Predictors, and Outcomes of New-Onset Atrial Fibrillation in Critically Ill Patients with Sepsis. A Cohort Study.
    Author: Klein Klouwenberg PM, Frencken JF, Kuipers S, Ong DS, Peelen LM, van Vught LA, Schultz MJ, van der Poll T, Bonten MJ, Cremer OL, MARS Consortium *.
    Journal: Am J Respir Crit Care Med; 2017 Jan 15; 195(2):205-211. PubMed ID: 27467907.
    Abstract:
    RATIONALE: Patients admitted to intensive care units with sepsis are prone to developing cardiac dysrhythmias, most commonly atrial fibrillation. OBJECTIVES: To determine the incidence, risk factors, and outcomes of atrial fibrillation in a cohort of critically ill patients with sepsis. METHODS: We assessed the association between atrial fibrillation and mortality using time-dependent competing risks survival analysis. Subsequently, for development of a risk score estimating the probability of a first occurrence of atrial fibrillation within the following 24 hours, we performed logistic regression analysis. MEASUREMENTS AND MAIN RESULTS: Among 1,782 patients with sepsis admitted to two tertiary intensive care units in the Netherlands between January 2011 and June 2013, a total of 1,087 episodes of atrial fibrillation occurred in 418 (23%) individuals. The cumulative risk of new-onset atrial fibrillation was 10% (95% confidence interval [CI], 8-12), 22% (95% CI, 18-25), and 40% (95% CI, 36-44) in patients with sepsis, severe sepsis, and septic shock, respectively. New-onset atrial fibrillation was associated with a longer stay (hazard ratio [HR], 0.55; 95% CI, 0.48-0.64), an increased death rate (HR, 1.52; 95% CI, 1.16-2.00), and an overall increased mortality risk (subdistribution HR, 2.10; 95% CI, 1.61-2.73) when considering discharge as a competing event. A simple risk score for daily prediction of atrial fibrillation occurrence yielded good discrimination (C statistic, 0.81; 95% CI, 0.79-0.84) and calibration (chi-square, 9.38; P = 0.31), with similar performance in an independent validation cohort (C statistic, 0.80; 95% CI, 0.76-0.85). CONCLUSIONS: Atrial fibrillation is a common complication of sepsis and independently associated with excess mortality. A simple risk score may identify patients at high risk of this complication. Clinical trial registered with www.clinicaltrials.gov (NCT 01905033).
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