Abstract
In India, a significant scarcity of published data exists regarding chronic limb-threatening ischemia (CLTI) and its management, especially among the elderly population. CLTI, often accompanied by frailty poses a significant healthcare challenge. While endovascular interventions offer hope, there remains a dearth of outcome data for this age group. This study seeks to address this critical gap by investigating the impact of frailty on outcomes, emphasizing amputation-free survival (AFS), wound healing, and health-related quality of life (HRQoL). Our study included 131 elderly CLTI patients aged ≥70 years who underwent infrainguinal endovascular interventions between April 2018 and August 2021, with a follow-up period of 2 years. Among the patients, 93.9% had diabetes mellitus and 82.4% had hypertension. Clinical frailty was assessed using the Clinical Frailty Scale (CFS). Patients were categorized into Group 1 (CFS 1-5) and Group 2 (CFS 6-9). Primary outcomes were AFS, wound healing, HRQoL, and their association with frailty. Secondary outcomes included technical success, procedure-related complications, major adverse limb events (MALE), major adverse cardiovascular events (MACE), vessel patency, re-intervention rates, and mortality rates including peri-procedural and overall mortality. Technical success was achieved in 86.3% of patients, with frailty significantly influencing this outcome. Group 2 exhibited reduced technical success (80.8%) compared to Group 1 (93.1%). The major amputation rate was 9.2%, with higher rates in Group 2 [univariate Hazard Ratio (HR): 5.20; p=0.033]. Similarly, Group 2 showed elevated overall mortality [univariate HR: 5.18; p < 0.001]. AFS at 1 and 2 years were 67.9% and 55% respectively, with higher rates in Group 1. Wound healing was achieved in 76.1% of patients (83/109), with frailty significantly associated with delayed wound healing (p < 0.001). Vessel patency at 1 year was observed in 88.8% of patients. HRQoL significantly improved post-intervention, with VascuQol-6 scores increasing from an average of 9 of 24 at baseline to 20 of 24 at 2 years. Frailty score significantly correlated with VascuQol-6 scores at 1 and 2 years (p < 0.0012). Group 1 exhibited higher VascuQol-6 scores compared to Group 2, indicating improved HRQoL during follow-up. Successful endovascular treatments in high-risk CLTI patients promote improved wound healing and post-treatment quality of life (QoL). Frailty should be assessed before endovascular interventions as it correlates with adverse outcomes, including amputations and mortality. While revascularization holds promise, caution is advised for frailer patients, emphasizing the importance of personalized care and tailored treatments for elderly CLTI patients.
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