JOURNAL ARTICLE
RESEARCH SUPPORT, NON-U.S. GOV'T
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Trends and Characteristics of Emergency Department Patients Prescribed Novel Oral Anticoagulants.

BACKGROUND: Since 2010, several novel oral anticoagulants (NOACs) have been approved by the United States Food and Drug Administration for the use in the prevention of cerebrovascular accidents (CVAs) in nonvalvular atrial fibrillation.

OBJECTIVE: Our aim was to describe the trends and characteristics of NOAC-related emergency department (ED) visits.

METHODS: Retrospective review of data from an ED tracking system of all visits that had a medication reconciliation with an NOAC or warfarin to a tertiary care ED between October 2010 and August 2014. Basic demographics, admission rate, admission diagnoses, and trends were analyzed.

RESULTS: The rate of warfarin visits was stable at 50-60 patients per month (PPM) per 1000 ED visits, however, the rate of dabigatran visits rose to 3-5 PPM/1000 until 2012 and has stayed stable, while rivaroxaban and apixaban have been gradually increasing to 2-4 and 1-2 PPM/1000, respectively. The admission rate for warfarin was 63.7% and for NOACs was 58.1%, compared to baseline admission rate of 35.5%. The hemorrhagic diagnosis rate was similar for warfarin and the NOACs (8.8% and 8.0%, respectively). There were three significantly different admission diagnoses: there were more admission for atrial fibrillation (5.4% vs. 1.9%) and CVA/transient ischemic attack (5.3% vs. 3.0%) in the NOAC group, while there were more admissions for intracranial hemorrhage (2.7% vs. 0.8%) in the warfarin group.

CONCLUSIONS: There has been a steady increase of ED patients who are taking an NOAC. There is a nearly double admission rate for an anticoagulated patient regardless of reason for ED visit. There appears to be no difference between rates of bleeding between warfarin and NOACs, although patients taking NOACs are admitted less often for intracranial hemorrhage.

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