The BEST-CLI Trial: A Multidisciplinary Effort to Assess Which Therapy is Best for Patients With Critical Limb Ischemia

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Critical limb ischemia (CLI) is the most severe form of peripheral arterial disease and is associated with a significant risk of limb loss. It is currently treated with limb revascularization by a variety of specialists. Although both open vascular bypass and endovascular therapy are offered to patients with infrainguinal peripheral arterial disease and CLI, significant disagreement exists as to which therapy works best in candidates for both types of intervention. Persistent clinical equipoise in combination with a paucity of comparative effectiveness data to guide treatment of CLI has led to a multidisciplinary effort to organize the Best Endovascular versus Best Surgical Therapy in patients with CLI (BEST-CLI) trial. The BEST-CLI trial is a pragmatic, multicenter, open label, randomized trial that compares best endovascular therapy with best open surgical treatment in patients eligible for both treatments. This trial is highly innovative in both its design and its collaborative nature. BEST-CLI aims to provide urgently needed clinical guidance for CLI management by using (1) a pragmatic design comparing the effectiveness of established techniques while allowing for the introduction of newer therapies as they become available; (2) a novel primary end point that includes limb amputation rates, repeat intervention, and mortality; (3) a multidisciplinary structure that fosters cooperation among interventional cardiologists, interventional radiologists, vascular surgeons, and vascular medicine specialists; and (4) novel techniques to evaluate the cost-effectiveness and quality-of-life outcomes of the 2 treatment strategies being tested.

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