Patterns of Angiographic Remodeling Following Foot Vein Arterialization

Area of Science:

• Vascular Surgery
• Interventional Radiology
• Vascular Imaging

Background:

• Foot vein arterialization (FVA) offers limb salvage for chronic limb-threatening ischemia (CLTI) but its perfusion mechanisms are unclear.
• FVA initially creates an arterialized circuit within the foot vein fortress (FVF), followed by remodeling over time.

Purpose of the Study:

• To introduce a novel classification system for angiographic patterns of vascular remodeling after FVA.
• To hypothesize the pathophysiology and clinical implications of these observed remodeling patterns for limb salvage.

Main Methods:

• Retrospective observational case series of no-option CLTI patients with clinically successful FVA.
• Identification and classification of 6 distinct vascular remodeling patterns (Type 0-5) based on follow-up angiographic studies.

Main Results:

• Nineteen patients were evaluated, with initial Type 0 (confined circuit) and Type 1 (expansion) patterns observed.
• During follow-up (mean 164 days), Type 1 was most common (67.4%), followed by Type 2 (wound blush, 41.9%), Type 3 (fistulas, 23.3%), Type 5 (collaterals, 16.3%), Type 0 (11.6%), and Type 4 (self-pruning, 9.3%).

Conclusions:

• Vascular remodeling post-FVA is complex, involving diverse pathophysiological mechanisms and resulting in varied angiographic patterns.
• This classification aids in understanding FVA maturation, identifying suboptimal remodeling, and guiding targeted interventions to enhance perfusion and limb salvage.
• Recognizing these patterns is crucial for optimizing FVA efficacy and improving clinical outcomes in CLTI patients.