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Heart FailureJanuary 2019Summary reviewed June 2026

What the REGROUP Trial Found — Two Vein Harvesting Methods for Bypass Surgery

Researchers compared two ways to harvest veins for heart bypass surgery: open surgery (cutting the leg) versus endoscopic (small incisions with a camera). After nearly 3 years, both methods led to similar rates of death, heart attacks, and repeat procedures.

What the trial was testing

The REGROUP enrolled 1,150 patients with heart failure. The study was sponsored by VA Office of Research and Development and tracked outcomes across the full group of patients who matched the trial's eligibility profile.

Researchers followed patients through treatment and into recovery, tracking the outcomes that mattered most for the disease being studied.

What the results showed

15.5% of open-harvest patients and 13.9% of endoscopic-harvest patients had major heart events—no significant difference.

The New England journal of medicine · 2019 · NCT01850082

These findings — that no meaningful difference in death, heart attack, or repeat procedures between the two harvesting methods — were published in the The New England journal of medicine and represent the headline result of the study.

Researchers tracked outcomes across 1,150 patients enrolled in the trial. The result was consistent enough across the group that the team felt confident reporting it.

What this means for patients

For patients with heart failure, this result changes the calculus on what to ask their care team about. Whether it changes day-to-day care depends on factors like disease subtype, prior treatments, and where the patient is in their care journey.

What you can do now

Both vein-harvesting techniques are widely used and FDA-cleared for bypass surgery. If you're having bypass, ask your surgeon which method they use and why. Endoscopic harvest may lower leg wound infections slightly, but overall heart outcomes appear similar.

Eligibility for the treatments mentioned above depends on specific test results and clinical history. Bring this summary, the trial name, and your most recent labs or pathology report to your next visit.