Optimizing Saphenous Vein Grafts: From Workhorse to an Evidence-Based Conduit Strategy

The saphenous vein graft (SVG) remains the most common conduit in coronary artery bypass grafting (CABG) but suffers from inferior long-term patency compared with arterial grafts. This review evaluates the concept of viewing the SVG not as an inherently flawed conduit but as one that can be systematically optimized through evidence-based strategies.

A narrative review was conducted to address the following clinical question: "In patients undergoing CABG, how do contemporary surgical harvesting techniques, intraoperative preservation methods, and postoperative pharmacologic strategies interact to optimize the long-term patency of saphenous vein grafts?" We synthesized evidence from recent landmark randomized controlled trials and meta-analyses to define a comprehensive optimization strategy.

SVG failure is a cascade initiated by surgical trauma and propagated by hemodynamic stress. The "no-touch" harvesting technique, which preserves protective perivascular tissue, has demonstrated superior long-term patency in classic trials, although recent evidence has sparked debate regarding its universal reproducibility. Intraoperative preservation with endothelial-sparing solutions and aggressive postoperative pharmacotherapy-including high-intensity statins and tailored antiplatelet strategies-provide crucial secondary protection. Notably, when graft failure occurs, recent randomized evidence challenges the dogma of a strict "native vessel first" approach, supporting instead an individualized, anatomy-driven strategy that balances early procedural hazard against long-term durability.

The SVG is an optimizable conduit. A modern, integrated approach-combining meticulous harvesting, biological preservation, and aggressive secondary prevention-can substantially improve graft durability. By shifting focus from simple conduit selection to comprehensive conduit optimization and appropriate patient-specific target selection, the Heart Team can significantly improve long-term cardiovascular outcomes.