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Ann Thorac Surg 2007;83:986-992
© 2007 The Society of Thoracic Surgeons
a Central Florida Regional Hospital, Sanford, Florida
b Medical City Dallas Hospital, Dallas, Texas
c HCA Cardiovascular Care Management Network, Nashville, Tennessee
d Cardiopulmonary Research Science and Technology Institute, Dallas, Texas
Accepted for publication October 23, 2006.
* Address correspondence to Syma L. Prince, RN, Cardiopulmonary Research Science and Technology Institute (CRSTI), 7777 Forest Lane, Ste C-742, Dallas, TX 75230 (Email: sprince{at}crsti.org).
Presented at the Fifty-second Annual Meeting of the Southern Thoracic Surgical Association, Orlando, FL, Nov 10–12, 2005.
Background: The Coronary Artery Revascularization (CARE) study is a multicenter observational registry of coronary revascularization by percutaneous and surgical techniques. As a substudy of this registry, we analyzed the current practice and outcomes of on-pump and off-pump coronary artery bypass graft (CABG) surgery.
Methods: Procedural and outcomes data were prospectively collected for all patients undergoing isolated CABG in eight community-based hospitals in the HCA Hospital System between February 1 and July 31, 2004. Twelve-month follow-up was obtained by patient contact, phone, questionnaire, and the National Death Index.
Results: Isolated coronary artery revascularization procedures were done in 1251 patients, with 12-month follow-up data available on 1149 (91.8%); 654 patients (52.3%) were operated on-pump and 597 (47.7%) had off-pump procedures. On-pump versus off-pump results were mean number of grafts, 3.4 ± 1 versus 2.9 ± 1.2 (p < 0.001); operative mortality, 1.7% versus 1.7% (p = 1.00); permanent stroke, 0.9% versus 0.7% (p = 0.51); reoperation for bleeding, 2.6% versus 1.0% (p = 0.037); prolonged ventilation, 10.0% versus 3.4% (p < 0.001); atrial fibrillation, 23.8% versus 14.9% (p < 0.001); need for transfusion, 51.0% versus 34.9% (p < 0.001); intensive care unit length of stay, 68.1 ± 97.0 hours versus 59.3 ± 109.4 hours (p = 0.16); and hospital length of stay, 7.5 days versus 6.2 days (p < 0.001). At 12 months, there was no difference in total cardiac mortality on-pump versus off-pump (4.9% versus 4.6%, p = 0.88), myocardial infarction (1.0% versus 0.7%, p = 0.76), need for repeat revascularization (2.8% versus 4.1%, p = 0.70), or total overall major adverse cardiac outcomes (8.7 versus 9.4, p = 0.69).
Conclusions: Current approaches to coronary revascularization using both on-pump and off-pump techniques at individual surgeon discretion, which varies significantly in the community setting, leads to acceptable outcomes. Although perioperative complications were less off-pump, mortality was the same, both in the perioperative period and at 12 months. Fewer grafts in the off-pump group appeared to be related to disease burden and not incomplete revascularization. Cardiac death, myocardial infarction, and the need for repeat revascularization were equal at 12 months.
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