Atrial arrhythmias (AA) are observed frequently early after lung transplant and also late after the surgery. Several predictive factors of post-operative AA after lung transplant have been already identified whereas those of late AA are still not known. Whether AA after lung transplant impacts mortality and the optimal strategy of rhythm management are still debated.

The Purpose of the study was to assess in a large cohort of lung transplanted patients the incidence of AA early and late after surgery, their predictive factors and their impact on mortality.

We included 271 consecutive patients single or double lung-transplanted over a 9-years period in a large French center. We collected baseline clinical, surgery and post-operative data. The follow-up was 2,9±2,4 years. 33% patients developed post-operative AA. Age (HR=2,35; CI [1,31-4,24]) and chronic obstructive pulmonary disease (HR=1,028; CI [1,12-4,03]) were independant predictive factors of post-operative AA. Late AA occurred 2,2±2,7 years after transplant in 8.8% of the patients. Systolic pulmonary arterial pressure was the only independent predictive factor of late AA (HR=1,028; CI [1,001; 1,056]). Double lung transplant was associated with long term freedom from AF compared with single transplant (p=0,05) whereas the Kaplan-Meier curve for the development of late atrial flutter was similar in single and double lung transplant. Early and late AA after surgery showed no impact on mortality. Bilateral lung transplant was associated with a better survival.

Post-operative AA after lung transplantation are common with good outcome and contrast with the low occurrence of late organized AA. Double lung transplantation protects against AF but not AFL. Underlying electrophysiological mechanisms may explain these observations. Predictive factors of early and late AA after transplantation are different. Nevertheless these AA do not impact mortality after lung transplant (figure next page).