Contemporary treatment of below-the-knee peripheral arterial disease in patients with chronic limb threatening ischemia: Observations from the Vascular Quality Initiative.

Objective: We sought to determine trends in percutaneous transluminal angioplasty (PTA) versus non-PTA interventions over time, as well as factors that influence the decision for non-PTA intervention.

Background: Although the optimal strategy for revascularization in patients with below-the-knee (BTK) chronic limb-threatening ischemia (CLTI) remains under investigation, PTA has been the preferred endovascular approach. Recently, there has been an increase in the use of non-PTA approaches for revascularization.

Methods: We performed a retrospective analysis of the Vascular Quality Initiative. Between 2011 and 2020, a total of 23,850 procedures corresponding to 33,098 arteries in 19,404 patients with CLTI were included. After application of exclusion criteria and removal of missing variables, 18,644 arteries were included in the study cohort. The primary analysis was factors associated with receiving non-PTA intervention. Secondary analysis included trends in PTA versus non-PTA intervention over time.

Results: Throughout the study period, the majority of interventions (72%) were PTA alone. The percentage of non-PTA interventions, on a per-artery basis, increased over the study period from 18% to 33%, p < 0.01. Advanced age, increasing TransAtlantic Inter-Society Consensus classification, and concomitant above-the-knee disease were associated with an increased likelihood for non-PTA intervention. In contrast, longer lesion length, insulin-dependent diabetes mellitus, bilateral disease, and discharge to location other than home were associated with an increased likelihood of PTA.

Conclusions: We observed a significant increase in the percentage of non-PTA interventions for patients with CLTI requiring BTK interventions over the last decade, with lesion- and patient-specific characteristics associated with the type of endovascular approach.