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Abstract Title:

Digoxin and Risk of Death in Adults with Atrial Fibrillation: The ATRIA-CVRN Study.

Abstract Source:

Circ Arrhythm Electrophysiol. 2014 Nov 20. Epub 2014 Nov 20. PMID: 25414270

Abstract Author(s):

James V Freeman, Kristi Reynolds, Margaret Fang, Natalia Udaltsova, Anthony Steimle, Niela K Pomernacki, Leila H Borowsky, Teresa N Harrison, Daniel E Singer, Alan S Go

Article Affiliation:

James V Freeman

Abstract:

BACKGROUND: -Digoxin remains commonly used for rate control in atrial fibrillation, but very limited data exist supporting this practice and some studies have shown an association with adverse outcomes. We examined the independent association between digoxin and risks of death and hospitalization in adults with incident atrial fibrillation and no heart failure.

METHODS AND RESULTS: -We performed a retrospective cohort study of 14,787 age, gender and high-dimensional propensity score-matched adults with incident atrial fibrillation and no prior heart failure or digoxin use in the AnTicoagulation and Risk factors In Atrial fibrillation-Cardiovascular Research Network (ATRIA-CVRN) Study within Kaiser Permanente Northern and Southern California. We examined the independent association between newly initiated digoxin and the risks of death and hospitalization using extended Cox regression. During a median 1.17 (interquartile range 0.49-1.97) years of follow-up among matched patients with atrial fibrillation, incident digoxin use was associated with higher rates of death (8.3 vs. 4.9 per 100 person-years, P<0.001) and hospitalization (60.1 vs. 37.2 per 100 person-years, P<0.001). Incident digoxin use was independently associated with a 71% higher risk of death (hazard ratio [HR] 1.71, 95%CI:1.52-1.93) and a 63% higher risk of hospitalization (HR 1.63, 95%CI:1.56-1.71). Results were consistent in subgroups of age and gender and when using"intent-to-treat"or"on-treatment"analytic approaches.

CONCLUSIONS: -In adults with atrial fibrillation, digoxin use was independently associated with higher risks of death and hospitalization. Given other available rate control options, digoxin should be used with caution in the management of atrial fibrillation.

Study Type : Human Study

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Sayer Ji
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