Incidence, risk factors, and clinical outcomes of atrial fibrillation and atrial flutter after heart transplantation

Tarun W Dasari, Biljana Pavlovic-Surjancev, Nilamkumar Patel, Alexis A Williams, Phoebe Ezidinma, Arti Rupani, James L Sinacore, Alain L Heroux
American Journal of Cardiology 2010 September 1, 106 (5): 737-41
Atrial fibrillation (AF) and atrial flutter (AFL) after heart transplantation (HT) has been associated with increased mortality. Diverse incidence rates have been reported to date, with no clear classification according to the time of onset of such arrhythmias. We determined the incidence of AF/AFL using the time of onset after HT and analyzed the associated risk factors and outcomes. We performed a retrospective study of 228 HT recipients (March 1996 to July 2007), including donor and recipient demographics, gender mismatch, ischemia time, surgical anastomosis, time of onset of AF/AFL, acute cellular rejection, left ventricular systolic function, and all-cause mortality. The mean age of the donors (81% men) was 30 +/- 12 years and of the recipients (78% men) was 53 +/- 11 years. AF/AFL occurred in 45 patients (20%): 24 (11%) in the first 30 days, 10 (4%) within the 31 days to 1 year, and 11 (5%) after 1 year. When the patients with AF/AFL were compared to those with sinus rhythm, the significant difference was the older mean age of the donors (p = 0.001) and the recipients (p = 0.02). The all-cause mortality rate was 43% for those with AF/AFL compared to 23% for those with sinus rhythm (hazard ratio 2.45; 95% confidence interval 1.2 to 4.8), mostly driven by the greater mortality in the later-onset AF/AFL group (>30 days after HT). In conclusion, AF and AFL have an incidence of 20% after HT and are associated with increased overall mortality compared to that in patients in sinus rhythm. AF/AFL is more common within the first 30 days of HT, with an overall incidence of 20%. Older donor and recipient age is a risk factor associated with AF/AFL.

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