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Eur J Cardiothorac Surg 2001;19:455-459
© 2001 Elsevier Science NL
a Department of Cardiac Surgery and Cardiology, Institute of Cardiology, Medical University of Gdansk, Debinki 7, 80-211 Gdansk, Poland
b Department of Anaesthesiology and Intensive Therapy, Medical University of Gdansk, Debinki 7, 80-211 Gdansk, Poland
Received 5 October 2000; received in revised form 11 February 2001; accepted 14 February 2001.
Corresponding author. Tel./fax: +48-58-341-7669
e-mail: jsiebert{at}amg.gda.pl
Objective: Atrial fibrillation (AF), the common postoperative complication, has been observed after coronary artery bypass grafting (CABG) in 7–40% of patients. Cardiopulmonary bypass (CPB), eliminated in off-pump operations (OPCABG) may decrease the incidence of AF, whereas the combination of CABG with heart valve replacement may result in more frequent postoperative atrial fibrillation. The aim of our study was to compare the early postoperative AF incidence rate during ICU stay in three groups of patients: after CABG, OPCABG, and CABG combined with valve replacement. Material and methods: A prospective study of 906 consecutive patients was carried out between January 1999 and January 2000. Clinical profile of 906 patients, including factors having potential influence on postoperative AF did not showed any significant differences between the groups. The presence of arrhythmia history was the reason of excluding 85 patients from the statistical analysis. The observation was performed in each case during ICU-stay, using a HP system for continuos automated arrhythmia analysis. Early postoperative incidence of AF was recorded and compared between three groups of patients: 650 after conventional CABG, 118 after OPCABG, and 53 after CABG combined with valve replacement. Chi-square and a Mann–Whitney tests, Statistica 5.0 PL were used for the statistical analysis. Results: Atrial fibrillation occurred during the postoperative ICU stay in 9.8% of patients after CABG, in 10.2% after OPCABG, and in 21% after CABG combined with valve replacement. There was no significant difference between CABG and OPCABG groups (P=0.965). The confidence interval of the odds ratio ranges from 0.5 to 1.85. Consequently, an increased risk would be possible for both methods. We observed a statistically significant increase of the early postoperative atrial fibrillation incidence rate in patients after CABG combined with valve replacement, when compared with both CABG + OPCABG groups (P=0.005). Conclusions: (1) Atrial fibrillation is a common postoperative complication after myocardial revascularization procedures which prolongs ICU stay. (2) The study did not show that the incidence of postoperative AF is influenced by the technique of coronary artery bypass grafting: with or without CPB. (3) The prevalence of postoperative AF increase when CABG is combined with valve replacement.
Key Words: Atrial fibrillation • Coronary artery bypass graft • Off-pump coronary artery bypass graft • Myocardial revascularization and valve replacement
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