BACKGROUND: In an attempt to avoid the deleterious effects of cardiopulmonary bypass, off-pump coronary artery bypass grafting has been rediscovered and refined. The purpose of this study was to compare clinical outcomes, length of stay, and hospital costs with coronary artery bypass grafting on cardiopulmonary bypass. METHODS: Coronary artery bypass was performed on 51 patients without cardiopulmonary bypass. Patients were selected on the basis of coronary anatomy, with significant stenoses in the left anterior descending, ramus intermedius, diagonal, right coronary, acute marginal, or posterior descending territories. Outcomes were compared with those of a computer-generated matched control group having coronary artery bypass grafting on cardiopulmonary bypass (n = 248) during the same time period. RESULTS: No preoperative differences were noted between groups. There were no deaths in the off-pump group and a mortality rate of 1.6% (4/248) in the control group. There was no incidence of stroke, myocardial infarction, or reentry for bleeding among patients in the off-pump group. There was a reduction in length of stay by 3 days (p = 0.01), blood transfusions by 50% (p = 0.0001), and hospital charges by one third (p = 0.05) in the off-pump group. Twenty-six patients had repeat coronary angiography before discharge; 41/43 grafts were widely patent, 1/43 was totally occluded, and 1/43 was narrowed by more than 50%. All internal mammary artery grafts were widely patent. CONCLUSIONS: Off-pump multivessel cardiopulmonary bypass grafting is a safe and effective means of revascularization for patients with coronary stenoses in the anterior or inferior regions, with excellent short-term patency rates and minimal morbidity.
BACKGROUND: In an attempt to avoid the deleterious effects of cardiopulmonary bypass, off-pump coronary artery bypass grafting has been rediscovered and refined. The purpose of this study was to compare clinical outcomes, length of stay, and hospital costs with coronary artery bypass grafting on cardiopulmonary bypass. METHODS: Coronary artery bypass was performed on 51 patients without cardiopulmonary bypass. Patients were selected on the basis of coronary anatomy, with significant stenoses in the left anterior descending, ramus intermedius, diagonal, right coronary, acute marginal, or posterior descending territories. Outcomes were compared with those of a computer-generated matched control group having coronary artery bypass grafting on cardiopulmonary bypass (n = 248) during the same time period. RESULTS: No preoperative differences were noted between groups. There were no deaths in the off-pump group and a mortality rate of 1.6% (4/248) in the control group. There was no incidence of stroke, myocardial infarction, or reentry for bleeding among patients in the off-pump group. There was a reduction in length of stay by 3 days (p = 0.01), blood transfusions by 50% (p = 0.0001), and hospital charges by one third (p = 0.05) in the off-pump group. Twenty-six patients had repeat coronary angiography before discharge; 41/43 grafts were widely patent, 1/43 was totally occluded, and 1/43 was narrowed by more than 50%. All internal mammary artery grafts were widely patent. CONCLUSIONS: Off-pump multivessel cardiopulmonary bypass grafting is a safe and effective means of revascularization for patients with coronary stenoses in the anterior or inferior regions, with excellent short-term patency rates and minimal morbidity.