Prevalence of Subclavian Artery Stenosis in Patients With Coronary Artery Disease
Abstract Background : Atherosclerosis is the most common and serious vascular disease that affects both the brain and the heart .(1) Subclavian stenosis/occlusion is a marker for atherosclerotic disease (eg, carotid, coronary & lower extremity arteries) and future adverse cardiovascular events. (2) In this study, we identified the prevalence of subclavian artery stenosis in patients presented with coronary artery disease (CAD) through changes in the Doppler tracing of vertebral arteries that appear to represent a clue of subclavian artery stenosis.Methods: On the basis of extracranial Doppler ultrasound & supplementary intracranial Doppler ultrasound, we assessed the pattern of Doppler waveform in both carotid & vertebrobasilar systems among 100 consecutive patients who were hospitalized for CAD in the cardiovascular department.Results: Among 100 consecutive CAD patients studied, we identified stenosis and occlusion of subclavian artery in 5 patients (5%). In those patients, subclavian arterial disease was indirectly discovered by changes in Doppler waveforms of vertebral artery. Conclusions: Prevalence of subclavian artery stenosis in patients with CAD is 5%. Changes in the pulse contour of antegrade vertebral artery Doppler waveforms seem to represent a good screening method for subclavian steal phenomena.
