Incidence of coronary artery lesions in children with recurrent Kawasaki disease.

Objective: Coronary artery lesions (CALs) are a major complication of Kawasaki disease (KD); however, data on CAL incidence and risk factors in recurrent KD are limited.

Methods: Ninety-seven children with recurrent KD were retrospectively enrolled from 2013 to 2022, and CAL incidence was tracked during admission, discharge, and during follow-up.

Results: Initially, 27.8% had CAL at admission and discharge, declining to 7.2% at 12 months post-discharge. Most patients (66 of 97, 68.0%) did not exhibit CAL at any of the time points, 7 cases presented CAL at all time points, indicating a persistent CAL. The remaining 20 cases presented CAL at admission but recovered at discharge or during follow-up. Notably, transient CALs had presented at discharge, or during the follow-up, but finally resolved at 12 months after discharge. Notably, prior IVIG resistance and increased prothrombin time seemed associated with CAL in recurrent KD, suggesting they could help identify patients needing close monitoring.

Conclusion: The study highlights decreasing CAL incidence over time in recurrent KD but with diverse patterns, emphasizing the importance of monitoring and further investigations to confirm these findings.