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Eur J Cardiothorac Surg 2004;25:16-20
© 2004 Elsevier Science NL

Prevention of atrial fibrillation after cardiac valvular surgery by epicardial, biatrial synchronous pacing

^a Division of Cardiology, Department of Internal Medicine, Stadtspital Triemli, CH-8063 Zurich, Switzerland
^b Department of Cardiovascular Surgery, Stadtspital Triemli, CH-8063 Zurich, Switzerland

Received 15 July 2003; received in revised form 19 September 2003; accepted 21 September 2003.

^* Corresponding author. Tel.: +41-1-466-1111; fax: +41-1-466-2599
e-mail: marianne.debrunner{at}triemli.stzh.ch

Objective: Postoperative atrial fibrillation (AF) after cardiac surgery is a frequent complication after valvular surgery (30–60%). The purpose of this prospective, randomized study was to determine if biatrial synchronous pacing reduces postoperative AF after cardiac valvular surgery as compared to conventional therapy. Methods: Eighty patients subjected to valvular surgery (52 men, age 66±10 years) were randomized to one of two groups: one group was treated with biatrial, synchronous pacing (BAP) for 72 h postoperatively (n=40) the other group received no atrial pacing (controls; n=40). All patients had one pair of epicardial wires attached to the right atrium. An additional electrode was placed to the left atrium in the BAP group. These patients were continuously paced at a rate of 10 beats per minute higher than the intrinsic rate starting immediately after surgery. All patients were monitored with full disclosure telemetry or Holter monitors to identify onset of AF. Results: Eighteen of the 40 patients in the control group (45%) developed AF within the first 3 days postoperatively as compared to eight patients (20%) in the BAP group (P=0.02). No complications occurred associated with the placement, maintenance and removal of the atrial pacing electrodes. Conclusions: Temporary, biatrial synchronous pacing during the first 3 postoperative days is safe and has a significant rhythm-stabilizing effect in patients undergoing valvular cardiac surgery.

Key Words: Arrhythmia • Atrial fibrillation • Pacing • Cardiac surgery • Heart valve replacement

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