Increased risk of stroke and mortality following new-onset atrial fibrillation during hospitalization

Daniele Massera, Dan Wang, David A. Vorchheimer, Abdissa Negassa, Mario J. Garcia

Research output: Contribution to journalArticle

2 Scopus citations


Aims The outcome of patients who develop new-onset atrial fibrillation (AF) during hospitalization is unknown, and the management of this patient population is not specifically addressed by current guidelines. We investigated the incidence of death and inhospital stroke among a large cohort of hospitalized inpatients who developed new-onset AF. Methods and results All patients ≥50 years of age admitted to a tertiary academic medical centre (20 April 2005 to 31 December 2011; n = 84 919) were studied. Demographic variables were compared among patients categorized as having new-onset, pre-existing, or no AF. A propensity-matched analysis was employed to compare outcomes by generalized estimating equations. Primary endpoints were all-cause 30-day and 1-year mortality and inhospital stroke. New-onset AF occurred in 1749 (2.1%) hospitalized patients. Among patients with new-onset AF, mortality at 30 days and 1 year was higher compared with patients without AF (at 30 days: OR 2.28, 95% CI 1.72-3.02, P < 0.0001; at 1 year: RR 1.53, 95% CI 1.36-1.73, P < 0.0001), and compared with patients with pre-existing AF at 30 days (OR 1.52, 95% CI 1.06-2.17, P = 0.02)- an effect that persisted as non-significant trend at 1 year (RR 1.14, 95% CI 0.98-1.34, P = 0.09). Risk of inhospital stroke was higher in patients with new-onset AF compared with patients without AF (OR 4.53, 95% CI 1.36-15.11, P = 0.02). Among patients with new-onset AF, the CHA 2 DS 2 -Vasc score correlated with incidence of inhospital stroke. Conclusion New-onset AF among hospitalized inpatients is independently associated with an increased incidence of stroke and mortality.

Original languageEnglish (US)
Pages (from-to)929-936
Number of pages8
Issue number6
StatePublished - Jun 1 2017



  • Atrial fibrillation
  • Hospitalization
  • Mortality
  • Stroke

ASJC Scopus subject areas

  • Cardiology and Cardiovascular Medicine
  • Physiology (medical)

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