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  • Title: A Global Vascular Guidelines-Based Bypass-Preferred Population and Their Surgical Risk Among CLTI Patients Treated With Endovascular Therapy in a Real-World Practice.
    Author: Okamoto S, Iida O, Takahara M, Hata Y, Asai M, Masuda M, Ishihara T, Nanto K, Kanda T, Tsujimura T, Okuno S, Matsuda Y, Mano T.
    Journal: J Endovasc Ther; 2020 Aug; 27(4):608-613. PubMed ID: 32419595.
    Abstract:
    PURPOSE: To determine in a chronic limb-threatening ischemia (CLTI) population who underwent endovascular therapy (EVT) how many patients would have been categorized as preferred for bypass surgery according to the Global Vascular Guidelines (GVG) and ascertain their surgical risk. MATERIALS AND METHODS: The current study analyzed 1043 CLTI patients who presented WIfI (wound, ischemia, and foot infection) stage ≥2 and underwent EVT between April 2010 and December 2017. Of these, 176 were excluded for lack of angiographic or other data, leaving 867 CLTI patients (mean age 74±10 years; 523 men) for stratification according to the GVG into bypass-preferred, indeterminate, or EVT-preferred groups. The GVG recommend bypass as the first-line treatment when the wound is severe (WIfI stage ≥3) and lesions are complex (GLASS stage III). Surgical risk was estimated using the modified PREVENT III risk score. To further stratify the bypass-preferred population according to mortality risk, a survival decision tree was constructed using recursive partitioning. RESULTS: The bypass-preferred group accounted for 55% [95% confidence interval (CI) 51% to 58%] of the overall population. The decision tree analysis extracted a low-mortality risk subgroup with a survival rate of 99% (95% CI 98% to 100%) at 1 month and 80% (95% CI 73% to 87%) at 2 years. According to the PREVENT III score, 34% (95% CI 27% to 42%) of the low mortality risk subgroup were classified as high surgical risk. CONCLUSION: A high proportion of patients undergoing EVT were considered bypass preferred based on the GVG, and the survival of these patients was not significantly different whether they were high or low surgical risk.
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