Abstract
To determine the relationship between ankle/brachial indices (ABIs) and morbidity and mortality in patients with peripheral arterial disease (PAD), a historical cohort study was performed. A total of 154 patients who had undergone noninvasive arterial assessment of the lower extremities in 1989 and 1990 were selected for this purpose. Selection criteria were age > 40 years at the time of investigation, a resting ABI < 0.90 and the availability of an ABI after exercise or arterial occlusion. Mortality and vascular events were recorded after an average follow-up period of 6 years. A vascular event was defined as an intervention because of PAD, the occurrence of a nonfatal myocardial infarction or stroke, a transient ischaemic attack or a coronary artery bypass graft (CABG) or percutaneous transluminal coronary angioplasty (PTCA) procedure. During the period studied, 44 patients died and 111 patients suffered a vascular event. The relative risk for mortality was 3.1 per 0.50 decrease of the ABI at rest (95% confidence interval (CI) 1.1-8.7, p = 0.03) and 2.4 per 0.50 decrease of the ABI after exercise or arterial occlusion (95% CI 0.9-6.4, p = 0.08). The relative risk for mortality or the occurrence of a vascular event was 3.3 per...Continue Reading
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