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'Off-pump' bypass surgery has similar outcomes, lower cost, than conventional bypass surgery

Coronary artery surgery performed "off-pump", i.e., keeping the heart beating and not using the cardiopulmonary bypass machine, has similar outcomes after one year, and costs less, when compared to conventional coronary artery bypass grafting (CABG) using cardiopulmonary bypass, according to a study in the April 21 issue of The Journal of the American Medical Association (JAMA).

To try to avoid some of the complications attributable to cardiopulmonary bypass, U.S. surgeons performed approximately 21 percent of coronary artery bypass operations off-pump in 2002, according to background information in the article. In off-pump operations, the heart is kept beating, and with the help of a device, the beating heart is stabilized while the surgeon places the bypass grafts around the blocked arteries. During a conventional CABG surgery, a heart-lung machine allows the heart to stop and pumps blood throughout the body, and keeps the body stabilized. Concerns remains about the technical difficulty of off-pump coronary artery bypass (OPCAB), including the possibility of imprecise grafting and incomplete revascularization compromising patient outcomes, and long-term graft patency (keeping the graft open).

John D. Puskas, M.D., M.Sc., of the Emory University School of Medicine and Emory Center for Outcomes Research, Atlanta, and colleagues conducted the Surgical Management of Arterial Revascularization Therapies (SMART) trial, designed to compare graft patency, clinical outcomes, health-related quality of life, and costs in unselected patients referred for elective, isolated CABG surgery and randomized to OPCAB or CABG with cardiopulmonary bypass. The study included 197 patients who had follow-up at 30 days; 185 of those had follow-up at 1 year. The study was conducted between March 10, 2000, and August 20, 2001, at a U.S. academic center.

The researchers found that graft patency was similar for OPCAB and conventional CABG with cardiopulmonary bypass a
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Contact: Cindy Sanders
404-686-8538
JAMA and Archives Journals
20-Apr-2004


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