Off-Pump Bypass Shows No Clear Overall Advantage in Frail Older Adults

Frailty makes heart bypass surgery riskier, raising questions about whether avoiding a heart-lung machine improves recovery. For older adults with reduced physical reserves, choosing the safest surgical approach could help protect survival, thinking skills, and independence. The FRAGILE trial directly compared two established bypass techniques in this vulnerable population.

Researchers randomly assigned 508 prefrail or frail adults aged 60 or older to surgery with or without a heart-lung machine across multiple centers. Median age was 68 years, and 30.5% were women. The main outcome combined death, heart attack, stroke, kidney failure, severe respiratory failure, or repeat surgery for bleeding within 30 days.

That outcome occurred in 10.9% of patients undergoing off-pump surgery and 16.0% undergoing on-pump surgery. Although numerically lower without the machine, the difference did not reach statistical significance. Surgical wound infections occurred in 3.5% versus 8.0%, respectively, a statistically significant difference. Estimated survival at one year was 96.1% versus 92.8%, but this difference also was not statistically significant.

Neither approach showed a significant advantage in thinking skills or quality of life at one year. These findings do not establish that either technique is superior overall. For patients and clinicians, they support discussing surgical options individually rather than assuming that avoiding the machine necessarily improves major outcomes. The infection finding deserves attention, but it was a secondary outcome.

This summary is based on the abstract only; detailed methods and complete results were unavailable. The trial was open-label, and the abstract does not describe frailty assessment, surgeon experience, or adjustment for testing multiple outcomes. Nonsignificant results do not prove equivalence or exclude meaningful differences. Follow-up of one year cannot establish longer-term effects on survival, independence, or bypass durability. Applicability to younger, nonfrail patients or different surgical settings remains uncertain. Individual decisions should still consider anatomy, overall health, and surgical expertise.