Background: Atrial arrhythmias (AA) are common following non-cardiac thoracic surgery. In particular, early postoperative AA after lung transplantation (LT) are very frequent, especially atrial fibrillation (AFib). Late AA occurrence following LT, instead, has been less commonly reported.Methods: Aim of the present systematic review and meta-analysis is to analyze the incidence rate of late AA and AFib in LT patients, with a special focus on double lung transplant (DLT), also to assess potential predictors of AFib occurrence. After bibliographic search (PUBMED/Medline and Embase databases), a random-effect model meta-analysis was performed: 7 studies were finally included, including 2,068 LT patients.Results: Pooled incidence rate (IR) of late AA was 4.3%/year (95% CI 2.8-6.1 %/year, I 2 = 69%), while late AFib IR was 1.5%/year (95% CI 0.7-2.6 %/year, I 2 = 87%). In patients undergoing DLT, pooled IR of late AA was 4.1%/year (95% CI 2.5-6.0 %/year, I 2 = 67%), while AFib IR was 0.9%/year (95% CI 0.1-2.4 %/year, I 2 = 92%). A longer follow-up duration significantly related to reduced IR of AFib (p = 0.02). History of AFib (HR 11.2, 95% CI 5.9-21.3) and early postoperative AFib (HR 10.3, 95% CI 5.9-18.0) emerged, instead, as relevant predictors of AFib occurrence.
Conclusion:Late AA occurence is not infrequent in LT patients; however, late Afib incidence was rare and showed a time-dependent decrease, particularly in double lung transplant patients, suggesting that a transmural PV isolation, the mainstay of transcatheter ablation, is effective in decreasing the likelihood of experiencing AFib.