Can preoperative serum level of creatinine predict new-onset atrial fibrillation in non-diabetic male patients undergoing open heart surgery? A retrograde view.

Renal dysfunction is a risk marker in patients who candidate for coronary artery bypass graft (CABG). Renal disorder is associated with prolonged stays in intensive care unit and hospital, morbidity and mortality. Aim of this study is specific evaluation of association between preoperative creatinine (Cr) with atrial fibrillation (AF) after elective off-pump CABG in non-diabetic male patients with normal ejection fraction. Two hundred non-diabetic male patients with normal ejection fraction undergoing elective off pump CABG surgery enrolled in this cross-sectional study and were stratified by present or absence of postoperative atrial fibrillation: patients with postoperative new-onset atrial fibrillation (n=100) as group 1 and patients without new-onset postoperative atrial fibrillation as group 2 (n=100). Preoperative serological test of the participants, such as serum creatinine, were recorded in their medical dossiers. Data were analyzed in SPSS-16 software and tested for association between atrial fibrillation with creatinine level by using student t test, chi-square test or logistic regression. Cr level in patients with and without AF three days before surgery were 1.8±0.3 and 1.0±0.4 respectively (P value for Cr=0.00). On surgical day, mean Cr level in patients with and without AF were 1.6±0.2 and 1.1±0.5 respectively (P value for Cr = 0.00). Of the 100, male patients with postoperative AF, duration and frequency of recurrence of AF were not associated with Cr at three days before surgery and on surgical days (P>0.05). Patients with postoperative AF had unsuitable status of renal function compare to patients without AF; however, preoperative serum creatinine cannot associate with duration and frequency of recurrence of AF.