New-onset versus prior history of atrial fibrillation: Outcomes from the AFFIRM trial

Abdulla A. Damluji, Mohammed S. Al-Damluji, George R. Marzouka, James Odell Coffey, Juan Viles Gonzalez, Mauricio G. Cohen, Mauro Moscucci, Robert J. Myerburg, Raul D. Mitrani

Research output: Contribution to journalArticlepeer-review

8 Scopus citations

Abstract

Background There are limited data on prognosis and outcomes of patients with new-onset atrial fibrillation (AF) compared with those with a prior history of AF. Methods and results We conducted a comparison of these 2 groups in the AFFIRM trial. New-onset AF was the qualifying arrhythmia in 1,391 patients (34%). Compared with patients with prior history of AF, patients with new-onset AF were more likely to have a history of heart failure. There was no mortality difference between rate control (RaC) and rhythm control (RhC) among patients with new-onset AF (17% vs 20%, P =.152). In the univariate model, new-onset AF was associated with increased risk of mortality compared with history of prior AF (RaC unadjusted hazard ratio [HR] 1.36 [P =.010], RhC unadjusted HR 1.39 [P =.003]). However, after multivariate adjustments, new-onset AF did not carry an increased risk of mortality (RaC adjusted HR 1.14 [P =.370], RhC adjusted HR 1.16 [P =.248]). Subjects with new-onset AF randomized to the RhC arm were more likely to remain in normal sinus rhythm at follow-up (adjusted HR 0.79, P =.012) compared with patients with prior history of AF. Conclusions In a multivariable analysis adjusting for confounders, new-onset AF was not associated with increased mortality compared with prior history of AF regardless of the treatment strategy. Patients with new-onset AF treated with the rhythm control strategy were more likely to remain in normal sinus rhythm on follow-up.

Original languageEnglish (US)
Pages (from-to)156-163.e1
JournalAmerican Heart Journal
Volume170
Issue number1
DOIs
StatePublished - Jul 1 2015

ASJC Scopus subject areas

  • Cardiology and Cardiovascular Medicine

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