Advanced limb salvage & amputation prevention — with the full range of heart and vascular care under one roof.
From the below-the-knee and pedal work that can prevent amputation to coronary artery disease and dialysis access — one practice for the full range of cardiovascular care, with most patients home the same day. When another center says a limb can't be saved, we take a closer look.
One practice, the full range of cardiovascular care.
From the arteries of the foot to the coronary arteries — diagnosis, intervention, and follow-up in one place.
Peripheral
PAD, CLTI & advanced limb salvage
Below-the-knee and pedal revascularization, with ultra-low-contrast and no-contrast options
Coronary
Coronary artery disease
Diagnostic angiography, stenting, and device therapy
Dialysis Access
Fistulograms, angioplasty & declots seen the same day if possible.
Treatment for a clotted, narrowed, or failing fistula or graft
Full-service heart and vascular care, with most procedures done same-day. Our technical success and safety data, with complete definitions: see our outcomes →
When a limb is threatened, speed matters
A limb losing its blood supply and a failing dialysis access are both time-sensitive. Our access commitments are built around that reality — so a referral moves quickly from phone call to treatment.
Kidney-protective by default. For patients with reduced kidney function we plan with kidney protection in mind, using contrast-sparing techniques and CO₂ angiography when appropriate. Kidney-protective care → · Dialysis access →
When others see amputation, we try everything first
Many people come to us after being told a leg can't be saved. We start from the opposite belief: that the limb is worth fighting for, and that the blockage behind the problem can often be reopened. Before anyone accepts an amputation, every reasonable option deserves to be tried. Because saving a limb depends on blood flow the whole way down, we treat the whole arterial tree — from inflow disease in the iliac arteries down to the small vessels of the foot.
That belief is backed by a full arsenal of advanced techniques many centers don't offer:
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Retrograde and pedal access — when a blockage can't be crossed from above, we work upward from a small artery in the foot or ankle to reopen it from below.
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Combined antegrade–retrograde technique — approaching a blockage from both directions at once to cross what a single direction can't.
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Pedal-loop and below-the-ankle reconstruction — reopening the small arteries of the foot itself, including the plantar arch, so blood reaches the wound rather than stopping at the ankle.
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Hospital-based procedures when a case needs more — most of our work is same-day and outpatient, but we escalate to the hospital setting when a complex case calls for added support.
This is the center of our work. Dr. Matthew Comstock and Dr. John Evans are fellowship-trained interventional cardiologists whose practice is centered on below-the-knee and below-the-ankle (BTK/BTA) revascularization. Refer a complex limb → Our mission →
Why limb salvage can't wait.
In advanced PAD and chronic limb-threatening ischemia the stakes are high — which is why reopening blood flow quickly can protect both the limb and the life.
1 in 4
-1 in 3
CLTI patients die within a year of diagnosis
And up to 1 in 3 face amputation — why restoring blood flow is urgent
Published figures (not practice data) — the superscript numbers link to each source.
Our services
How much experience does Oklahoma Cardiovascular Center have with complex limb salvage?
Below-the-knee and pedal revascularization is the center of our practice. Dr. Matthew Comstock and Dr. John Evans are fellowship-trained interventional cardiologists whose practice is centered on below-the-knee and below-the-ankle (BTK/BTA) revascularization — the deep, hands-on experience that lets us reopen the small arteries of the calf and foot that most programs decline. We treat in accordance with the 2024 American College of Cardiology and American Heart Association guideline on peripheral artery disease, the Global Vascular Guidelines on chronic limb-threatening ischemia, and best practices.