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Eur J Cardiothorac Surg 2004;26:1129-1133
© 2004 Elsevier Science NL

Atrial fibrillation after surgical revascularization: is there any difference between on-pump and off-pump?

Yavuz Enc^*, Bulent Ketenci, Deniz Ozsoy, Gercek Camur, Ilyas Kayacoglu, Sait Terzi, Sertac Cicek

Siyami Ersek Thoracic and Cardiovascular Surgery Center, Istanbul, Turkey

Received 13 June 2004; received in revised form 19 July 2004; accepted 23 July 2004.

^* Corresponding author. Address: Baglarbas mah. Fetih sok. No. 9, 41700 Darca/Gebze, Turkey. Tel.: +90-262-745-1416; fax: +90-216-348-6237. (E-mail: erenenc{at}superonline.com).

Objective: Postoperative atrial fibrillation (AF) is still frequent complication after cardiac surgery in spite of the improvements in the surgical procedures. There is still controversy whether or not, the absence of cardiopulmonary bypass results in a lower incidence of AF. Methods: Six hundered and seventy patients that underwent revascularization by using in situ LIMA for single vessel disease were included in this retrospective study and the patients were divided in two groups. Group I included 328 patients who underwent complete revascularization with cardiopulmonary bypass and group II consisted of 342 patients who underwent complete revascularization without cardiopulmonary bypass. Then, the incidence and predictive perioperative factors of AF in two groups were determined and compared with each other. Results: There were no significant differences between two groups with respect to the preoperative demographic characteristics of the patients. The incidence of postoperative AF was determined as 16.1% after on-pump and 14.6% after off-pump revascularization. Avoiding cardiopulmonary bypass did not decrease the incidence of postoperative AF. Sex, age over 65 years, prophylactic ß-blocker usage and left ventricular dysfunction were independent predictive factors in group I (r²=0.51; P<0.001). However, only age over 65 years and prophylactic ß-blocker usage were independent predictive factors in group II (r²=0.59; P<0.01). The rates of AF in both groups were decreased by using prophylactic ß-blocker usage (P=0.05 in group I, P<0.001 in group II). Conclusions: There is no reduction of AF rate in myocardial revascularization without cardiopulmonary bypass. However, prophylactic ß-blocker usage decreases the incidence of AF after both on-pump and off-pump myocardial revascularization.

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