Acute pericarditis after atrial fibrillation ablation: Incidence, characteristics, and risk factors.

Background: Little is known about the incidence and risk factors for the development of acute pericarditis after ablation for atrial fibrillation (AF).

Objective: The purpose of this retrospective cohort study was to describe the occurrence of and associations with suspected acute pericarditis after AF ablation.

Methods: All patients undergoing AF ablation in our center were enrolled in a prospectively maintained registry. Suspected acute pericarditis was defined as pericardial chest pain treated with disease specific anti-inflammatories within 3 months of AF ablation.

Results: Among 2215 patients with AF ablations between January 1, 2018, and December 31, 2019, 226 (10.2%) had suspected acute pericarditis. Treatments included colchicine in 149 patients (65.9%), prednisone in 66 (29.2%), and high-dose ibuprofen in 43 (19.0%). Multiple anti-inflammatory therapies were used in 57 patients (25%). At baseline, a lower CHADSVASc score and a higher body mass index were associated with pericarditis, whereas older patients were less likely to have pericarditis. With multivariable adjustment, age was associated with suspected acute pericarditis (odds ratio 0.95; 95% confidence interval 0.94-0.97; <.0001). Among patients with suspected pericarditis, postprocedure pericardial effusion was present in 9.3% and pericarditis electrocardiographic changes in 19.5%.

Conclusion: Suspected acute pericarditis is common after AF ablation and is associated with a younger age. Systematic assessments for acute pericarditis after AF ablation should be considered.