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  • Title: Incidence of Major Atherothrombotic Vascular Events among Patients with Peripheral Artery Disease after Revascularization.
    Author: Desai U, Kharat A, Hess CN, Milentijevic D, Laliberté F, Zuckerman P, Benson J, Lefebvre P, Hiatt WR, Bonaca MP.
    Journal: Ann Vasc Surg; 2021 Aug; 75():217-226. PubMed ID: 33819600.
    Abstract:
    BACKGROUND: Patients with peripheral artery disease (PAD) treated with lower extremity revascularization are at increased risk of major atherothrombotic vascular events (acute limb ischemia (ALI), major non-traumatic lower-limb amputation, myocardial infarction (MI), ischemic stroke, and cardiovascular (CV)-related death). This study assessed the incidence of major atherothrombotic vascular events, venous thromboembolism (VTE) events and rates of subsequent lower extremity revascularizations in the real-world among patients with PAD after revascularization. METHODS: Patients aged ≥50 years with PAD who underwent peripheral revascularization were identified from Optum Clinformatics Data Mart claims database (Q1/2014-Q2/2019). The first lower extremity revascularization after PAD diagnosis was defined as index date. Incidence rates of major atherothrombotic vascular events (i.e., composite of ALI, major non-traumatic lower-limb amputation, MI, ischemic stroke, and CV-related death) and VTE were assessed during follow-up as the number of events divided by patient-years of observation (censored at the first event). Rates of subsequent revascularizations and VTE were estimated overall and compared between patients with major atherothrombotic vascular events and those without. RESULTS: Of the 38,439 patients included, 6,675 (17.4%) had a major atherothrombotic vascular event during a median follow-up of 1.0 year. The composite major atherothrombotic vascular and VTE incidence rates were 13.81/100 patient years and 1.77/100 patient years, respectively, and 40.2% of patients experienced subsequent revascularizations. Patients with a post-revascularization major atherothrombotic vascular event had significantly higher rates of subsequent revascularizations (64.6% vs. 35.1%, standardized difference [SD] ≥10%) and VTE (4.6% vs. 2.1%, SD ≥10%) versus those without. CONCLUSION: One-in-six PAD patients aged ≥50 years who underwent peripheral revascularization experienced a major atherothrombotic vascular event within one year, and consequently, experienced higher rates of subsequent revascularizations compared with those without a major atherothrombotic vascular event post-revascularization. These findings highlight the need to improve strategies to prevent major atherothrombotic vascular events after revascularization.
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