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Ann Thorac Surg 2005;79:104-107
© 2005 The Society of Thoracic Surgeons
Division of Cardiac Surgery, The Johns Hopkins Medical Institution, Baltimore, Maryland, USA
Accepted for publication June 25, 2004.
* Address reprint requests to Dr Baumgartner, 618 Blalock Bldg, The Johns Hopkins Hospital, 600 North Wolfe St, Baltimore, MD21287 (E-mail: wbaumgar{at}csurg.jhmi.jhu.edu).
Presented at the Poster Session of the Fiftieth Annual Meeting of the Southern Thoracic Surgical Association, Bonita Springs, FL, Nov 13–15, 2003.
BACKGROUND: Temporary epicardial pacing wires are used routinely after coronary artery bypass graft (CABG) surgery and can cause rare, catastrophic complications. This study's purpose was to identify patient characteristics predicting the need for pacing after CABG surgery with the potential to limit their utilization.
METHODS: This prospective observational study involved 290 consecutive patients undergoing CABG at our institution from August 2000 to January 2001. Sixty-eight patients were excluded for the following reasons: off-pump CABG, preoperative pacemaker, no pacing wire placement, or incomplete follow-up. Among the remaining 222 patients, the incidence of pacing during the postoperative period was recorded. Univariate and independent multivariate predictors for postoperative pacing were determined using medical records, the Johns Hopkins Hospital cardiac surgery database and the Society of Thoracic Surgery database.
RESULTS: In the postoperative period, 19 of 222 patients (8.6%) required pacing. Univariate analysis identified age, cardiomegaly, preoperative antiarrhythmic therapy, diabetes mellitus, preoperative arrhythmia, inotropic agents leaving the operating room, and pacing initialized at the separation from cardiopulmonary bypass as predictors of the need for postoperative pacing. Only diabetes mellitus, preoperative arrhythmia, and pacing utilized to separate from bypass were found to be significant on multivariate analysis. Using this model, if we exclude the patients with any of these three risk factors, only 2.6% of them would have required pacing.
CONCLUSIONS: Few patients require temporary epicardial pacing after routine CABG. This study identified specific predictors for postoperative pacing requirements and provides criteria for the selective use of epicardial pacing wires after CABG.
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