Association between renal function, diastolic dysfunction, and postoperative atrial fibrillation following cardiac surgery

Background: Renal dysfunction is associated with a higher rate of atrial fibrillation in clinical practice. This study investigated the associations between renal function, left ventricular (LV) diastolic dysfunction, and postoperative atrial fibrillation (POAF). Methods and Results: A total of 265 consecutive patients who underwent cardiac surgery were prospectively enrolled in the study. Echocardiography was performed before cardiac surgery. The patients were divided into 3 groups based on estimated glomerular filtration rate (eGFR) (group 1, ≥90 ml · min^-1 · 1.73 m^-2; group 2, 60-90 ml · min^-1 · 1.73 m^-2; and group 3, -1 · 1.73 m^-2). POAF occurred in 83 of 265 patients (31.3%). The rate of new-onset POAF increased from 15.2% (12/79) in group 1 to 27.8% (27/97) in group 2 and 49.4% (44/89) in group 3 (P15 - also increased (group 1, 19.0%; group 2, 38.1%; and group 3, 48.3%; P