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No Evidence of Increased Death Risk Due to Endoscopic Vein Graft Harvest for Coronary Artery Bypass Graft Surgery

by Kathy Jones on August 2, 2012 at 9:28 PM
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 No Evidence of Increased Death Risk Due to Endoscopic Vein Graft Harvest for Coronary Artery Bypass Graft Surgery

A JAMA report reveals that undergoing endoscopic vein graft harvest for coronary artery bypass graft (CABG) surgery is not linked with a long-term increase of risk of death compared to open vein-graft harvesting.

The authors did find that the endoscopic technique was associated with a significant reduction in wound complications.

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"In the mid-1990s, surgeons began using endoscopic vein-graft harvesting techniques as an alternative to large, incision-based open vein-graft harvesting to improve postoperative discomfort and incision-site complications," according to background information in the article. "The perceived advantages of endoscopic vein-graft harvesting led to wide-spread adoption of the technique, and the devices have been used in the majority of the more than 400,000 CABG surgery procedures performed at U.S. surgical centers each year." In 2009, a study that included 3,000 patients called into question the safety of the endoscopic vein-graft harvesting technique, finding that patients who received this procedure had higher 3-year mortality than those receiving open vein-graft harvesting technique.

Judson B. Williams, M.D., M.H.S., of Duke University Medical Center, Durham, N.C., and colleagues conducted a study to assess use of the endoscopic vein-graft harvesting technique in CABG surgery and the risk of death, heart attack, and repeat revascularization. The observational study included 235,394 Medicare patients undergoing isolated CABG surgery between 2003 and 2008 at 934 surgical centers participating in the Society of Thoracic Surgeons (STS) national database. The STS records were linked to Medicare files to allow longitudinal assessment (median [midpoint] 3-year follow-up) through December 31, 2008.
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Based on Medicare Part B coding, 52 percent of patients received endoscopic vein-graft harvesting during CABG surgery. The researchers found no significant differences between the cumulative incidence rate for mortality through 3 years for the endoscopic (13.2 percent [12,429 events]) and open (13.4 percent [13,096 events]) vein-graft harvest groups. There were also no significant differences between the cumulative incidence through 3 years for the composite of death, heart attack, or revascularization among the endoscopic vs. open vein-graft harvest groups (19.5 percent [18,419 events] vs. 19.7 percent [19,232 events]).

Endoscopic vein-graft harvesting was associated with lower harvest site wound complications relative to open vein-graft harvesting (3.0 percent vs. 3.6 percent).

"Our study found that endoscopic vein-graft harvesting was the most commonly used technique for vein-graft harvesting, with approximately 70 percent of CABG surgery cases in the STS Adult Cardiac Surgery Database using this technique in 2008, the most recent year examined. After adjustment for baseline clinical factors, no evidence was found of increased long-term mortality or the composite of death, myocardial infarction, or revascularization associated with endoscopic vs. open vein-graft harvesting in isolated patients undergoing CABG surgery. Consistent with previous randomized comparisons, use of endoscopic vein-graft harvesting was associated with a significant reduction in wound complications relative to the open procedures," the authors conclude.

(JAMA. 2012;308[5]:475-484. Available pre-embargo to the media at http://media.jamanetwork.com)

Editor's Note: Please see the article for additional information, including other authors, author contributions and affiliations, financial disclosures, funding and support, etc.

Editorial: Endoscopic Vein-Graft Harvest Is Safe for CABG Surgery

In an accompanying editorial, Lawrence J. Dacey, M.D., M.S., of the Dartmouth-Hitchcock Medical Center, Lebanon, N.H., comments on the findings of this study.

"Physicians tend to do what is best for their patients. Patient satisfaction is markedly better with endoscopic vein-graft harvesting. Patients who have had both an endoscopic and open vein-graft harvest marvel at the difference in reduced pain and time of healing with endoscopic vein-graft harvesting. This conclusive study by Williams et al provides information to say with certainty that the benefits of endoscopic vein-graft harvesting in short-term patient-centered outcomes are not associated with an increased risk of important adverse long-term outcomes. And that is something to be thankful for."

(JAMA. 2012;308[5]:475-484. Available pre-embargo to the media at http://media.jamanetwork.com)

Editor's Note: The author has completed and submitted the ICMJE Form for Disclosure of Potential Conflicts of Interest and none were reported.



Source: Eurekalert
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