The Untold Story: Early and Mid-Term Results of Subintimal Angioplasty in Superficial Femoral Artery Versus Popliteal Artery Chronic Total Occlusion

Abstract

Objectives:

This study aims to compare the immediate and mid-term outcomes of subintimal angioplasty (SIA) of chronic total occlusions (CTOs) of superficial femoral artery (SFA) versus popliteal artery (PA) and to identify possible predictors of loss of limb-based patency (LBP).

Methods:

This is a retrospective analysis of chronic lower-limb ischemia (CLI) patients (Rutherford classes 3–6) presenting with CTO of SFA or PA treated by SIA and selective stenting in the period 2018 to 2021. Immediate outcomes were compared between the SFA and PA groups, including technical success, perioperative complications, and 30-day major amputation and mortality rates. Mid-term outcomes for technically successful procedures included limb-based patency (LBP), wound healing rate, amputation-free survival (AFS), and major adverse limb events (MALEs).

Results:

A total of 450 CLI patients underwent SIA of CTO at the SFA (n=260, 57.8%) and the PA (n=190, 42.2%). The indication for revascularization was chronic limb-threatening ischemia in 80.8% of SFA group and 84.2% of PA group. Technical success rate was higher in the PA group compared to the SFA group (96.3% vs 91.2%; p=0.03). The 30-day amputation rates were comparable between the SFA and PA groups (7.7% vs 6.8%, p=0.7, respectively). No perioperative mortality or systemic major complications occurred in the present study. Kaplan-Meier estimate of the 1-year rates were significantly better for SFA group regarding LBP (82% for SFA group vs 43% for PA group, p=0.006), AFS (88% vs 64%, p=0.02), and wound healing (79% vs 58%, p=0.027), respectively. The number of runoff vessels was the only factor associated with loss of LBP (hazard ratio [HR], 0.055; 95% confidence interval [CI]: 0.001–3.020, p=0.039).

Conclusions:

Subintimal angioplasty is an effective and safe endovascular treatment option of CTO at SFA and PA with satisfactory immediate outcomes. The mid-term outcomes, however, are better for SFA lesions in terms of improved LBP, AFS, and wound healing rates.

Clinical Impact:

Subintimal angioplasty is a valuable tool in the armamentarium of endovascular surgeons, as re-entry devices aren’t always widely accessible. This study aims to assess the technical outcomes of peripheral vascular interventions for infrainguinal chronic total occlusions and identify possible predictors for successful subintimal angioplasty .Subintimal angioplasty is an effective treatment option for infrainguinal CTO with difference in result of immediate outcomes in popliteal lesions and SFA lesions

Keywords

subintimal angioplasty chronic total occlusion peripheral vascular interventions

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