Management of claudicants with low toe-brachial index in a Veteran population.

Abstract

Intermittent claudication includes a wide spectrum of peripheral artery disease ranging from asymptomatic with reduced perfusion to lifestyle-limiting atherosclerotic disease. The purpose of this study was to evaluate the management of claudicants with a low toe-brachial index (TBI). This study was a retrospective review of consecutive patients that presented in 2015 with claudication and a low TBI (<0.6) monitored over 5years. The patient demographics, co-morbidities, and vascular-related characteristics (ankle-brachial index, TBI, calcified vessels, and wounds) were collected. The patients were separated into two cohorts: diabetics and non-diabetics. The outcomes included progression to chronic limb threatening ischemia (CLTI), interventions (endovascular or open), minor amputations, major amputations, and mortality. A total of 184 patients with 356 limbs were identified as claudicants with a low TBI, and there were 103 diabetics with 81 non-diabetics. The ABI and TBI were similar between the diabetics and non-diabetics, but the diabetics had a significantly higher number of calcified vessels (p < .001) and progression to CLTI (p < .001). The time to revascularization and number of patients that had a revascularization procedure were similar between the two groups, and nearly half of the revascularization procedures were performed within the first 6months. The major amputation rate trended higher in the diabetic population, and there was a statistically significantly higher rate of minor amputations in the diabetics over the 5years (Log-rank, p < .001). There was no difference in 5-year survival between diabetics and non-diabetics, and the overall 5-year mortality was 34%. Patients presenting with claudication and low TBI, especially with diabetes, are at a higher risk to develop chronic limb threatening ischemia. Claudicants with a low TBI should have closer follow-up and more aggressive risk factor modification to reduce long-term mortality.