Correspondence Letter by Raposeiras-Roubín et al Regarding Article, “Mortality Associated With Atrial Fibrillation in Patients With Myocardial Infarction: A Systematic Review and Meta-Analysis” To the Editor:

We have read in detail the meta-analysis of Jabre et al1 about the mortality associated with atrial fibrillation (AF) in patients with myocardial infarction. We believe it is an excellent work because of the interests in the subject and the delicacy of the analysis. However, we regret that the authors did not distinguish between the type of AF and the short- and long-term prognosis when making the analysis of mortality. Lau et al2 recently published the results of a multicenter registry of 3000 patients, which showed that new-onset AF was an independent predictor of hospital death, not follow-up death, unlike previous FA, which was an independent predictor of long-term mortality, but not in-hospital death. These results are consistent with those reported by Mehta et al3 with the results of the Global Registry of Acute Coronary Events. According to these authors, only new-onset AF is an independent predictor of in-hospital adverse events. New-onset AF in the setting of acute coronary syndrome reflects