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Eur J Cardiothorac Surg 2000;17:520-523
© 2000 Elsevier Science NL

Atrial fibrillation after coronary artery bypass grafting without cardiopulmonary bypass

^a Department of Cardiac Surgery Institute of Cardiology, Medical University of Gdansk, Debinki 7, 80-211 Gdansk, Poland
^b Department of Anesthesiology and Intensive Therapy, Medical University of Gdansk, Debinki 7, 80-211 Gdansk, Poland

Corresponding author. Tel./fax: +48-58-341-7669
e-mail: jsiebert{at}amg.gda.pl
e-mail: lanisim{at}amg.gda.pl

Objective: Atrial fibrillation is the most common complication after heart surgery. It rarely has a fatal outcome but causes patient instability, prolongs hospital stay, or even is the reason for perioperative infarction. Although conventional coronary artery bypass grafting (CABG) with cardiopulmonary bypass has excellent short-term and long-term results, the number of coronary operations on a beating heart without cardiopulmonary bypass is still growing. To reduce surgical trauma, off-pump coronary artery bypass grafting via sternotomy (OPCABG) or minimally invasive direct vision coronary artery bypass grafting (MIDCABG) via small thoracotomy are performed. The aim of this study was to estimate the frequency of atrial fibrillation in patients after myocardial revascularization without cardiopulmonary bypass. Methods: A retrospective analysis of 48 patients undergoing myocardial revascularization without cardiopulmonary bypass was performed. Twenty-four patients underwent OPCABG and 24 were operated using the MIDCABG technique. The incidence of cardiac arrhythmias was analyzed since operation to the fourth postoperative day. Each patient had continuous ECG monitoring with option of arrhythmia analysis during ICU stay. After discharge from ICU 24-h ECG monitor studies were carried out. Surface 12-lead ECG was accomplished once a day, and additionally each time symptoms of cardiac arrhythmia occurred. Risk factors of atrial fibrillation were estimated. Results: Atrial fibrillation occurred in 25% of patients after MIDCABG, in 29% after OPCABG, and in 18% after CABG with cardiopulmonary bypass. This difference has no statistical significance. Risk factors and incidence of postoperative complications were comparable in all groups. Conclusions: Atrial fibrillation is a common complication after procedures of myocardial revascularization, performed with or without cardiopulmonary bypass. The occurrence is not dependent on the type of operation.

Key Words: Atrial fibrillation • Myocardial revascularization • Coronary artery bypass graft • Off-pump coronary artery bypass graft • Minimally invasive direct vision coronary artery bypass graft

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