NPPB and atrial fibrillation: The results of this study may predict intraoperative response to ibutilide conversion by patient’s weight, the duration of atrial fibrillation, LA, and NT-proBNP levels, and duration of atrial fibrillation can predict early postoperative recurrence, helping to stratify the risk of atrial fibrillation recurrence and individualize the management of patients with atrial fibrillation.