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Pedal Arch Revascularization: Why the Foot’s Arteries Decide the Wound
The hardest foot wounds are the ones that keep coming back — perfused enough to look borderline, but never quite enough to heal. Increasingly, the evidence points to a single anatomic answer: the pedal arch.
MATTHEW J. COMSTOCK, DO, FACC, FSCAI · FOR REFERRING CLINICIANS
The pedal arch is the loop of arteries below the ankle that delivers the last few centimeters of flow to the wound bed. When the arch is out, wounds stall; when it is restored, the whole trajectory changes. This post summarizes what the below-the-ankle literature now shows, and how we approach that anatomy — so you can calibrate when a distal referral is worth it.
The evidence has moved below the ankle
The clinical benefit of below-the-ankle revascularization is consistent across registries and cohort studies, and it hinges on one thing: successfully restoring pedal-arch flow.
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Shahat et al. (J Endovasc Ther, 2026; 120 patients, WIfI 2–4) reported wound healing of 86.7% vs. 59.1% (p=0.007) and major amputation of 5.1% vs. 40.9% (p≤0.001) for successful vs. unsuccessful pedal arch revascularization, with 2-year amputation-free survival of 92.9% vs. 72.7% (p=0.018). Unsuccessful revascularization independently predicted both healing failure and major amputation.
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The RENDEZVOUS registry (Nakama et al., JACC Interv, 2017; 257 patients) reported overall limb salvage of 88.5% at 12 months. Its subanalysis found pedal artery angioplasty improved wound healing regardless of inframalleolar disease severity — moderate disease 58.8% vs. 40.0% (p=0.049), severe disease 59.6% vs. 33.2% (p=0.021).
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Jung et al. (EJVS, 2019; 87 propensity-matched pairs) found greater 1-year freedom from major amputation with pedal artery revascularization (96.3% vs. 84.2%, p=0.009), and identified successful pedal revascularization as an independent factor associated with wound healing (HR 1.56). Note the honest detail: across the matched groups as a whole, healing did not differ significantly — the benefit appeared in the patients whose pedal revascularization actually succeeded.
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In diabetic foot ulcers with below-the-ankle disease, Meloni et al. (J Clin Med, 2021; 80 patients) reported 12-month healing of 89.3% vs. 9.1% (p<0.0001) and major amputation of 2.1% vs. 36.3% (p<0.0001) for successful vs. failed foot revascularization. Failed foot revascularization was an independent predictor of non-healing and of amputation.
The 2024 ACC/AHA PAD Guideline frames the objective the same way: maximize perfusion to the foot, ideally direct, angiosome-directed flow to the wound. The 2024 JACC position statement on below-the-knee revascularization specifically endorses the pedal-plantar loop technique — crossing the deep plantar arch to recanalize a second tibial vessel retrograde — for extensive tissue loss, forefoot and heel wounds, and planned transmetatarsal amputation, where maximal foot perfusion matters most.
The common thread: the benefit is gated on achieving the distal result. That is also the step most programs are not equipped to complete — the pedal-plantar loop is technically demanding, and calcified below-the-ankle anatomy is unforgiving.
Figures cited above are drawn from the published literature. Sample sizes are small and most of these studies are retrospective; none is a randomized trial.
Read together, the point is straightforward: the benefit is gated on achieving the distal result. Restoring inline flow to the foot is the prerequisite for healing, and reaching those vessels is exactly what a distal referral is for.
What the evidence above is — and is not
These are procedural and wound-healing endpoints drawn from the published studies cited above. Technical success is not the same as limb salvage, and limb salvage is not the same as a healed wound. Every study cited here is small; three of the four are retrospective. They point consistently in one direction — that reaching the pedal arch changes what happens to the foot — but none of them is a randomized trial.
Below-the-Knee & Pedal Revascularization → Refer a patient →
When to refer — and how
Consider a distal referral, ideally before tissue loss advances, for:
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A non-healing foot wound, rest pain, or tissue loss — particularly with below-the-knee or pedal disease
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A patient told amputation is the next step, especially with a wound below the ankle
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Diabetic foot ulcers where perfusion is limiting healing
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Forefoot or heel wounds, or a planned transmetatarsal amputation, where maximal foot perfusion is needed
We schedule urgent limb cases quickly, treat through a small puncture in the outpatient setting where appropriate, and close the loop with you on findings and plan. Your patient stays your patient.
When a foot wound will not heal, the reason is often where the blockage sits — down in the arch of the foot, where flow can still be restored. If you have a limb you are worried about, send it our way for an evaluation.
Below-the-Knee & Pedal Revascularization → Diabetic Foot Ulcers → For Referring Providers →
For referring providers — We welcome referrals for non-healing foot wounds, rest pain, tissue loss, and any limb where amputation has been proposed. Refer: (918) 943-5303 · fax (855) 312-3594.
Refer urgently: a non-healing wound with rest pain, spreading infection, or a limb where amputation has been recommended · Routinely: a diabetic foot ulcer or forefoot/heel wound where perfusion may be limiting healing. Full referral guide →