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  • Title: [Subclavian steal: transcranial Doppler sonography of the basilar artery].
    Author: Büdingen HJ, Staudacher T, Stoeter P.
    Journal: Ultraschall Med; 1987 Oct; 8(5):218-25. PubMed ID: 2961057.
    Abstract:
    In 32 patients with high-grade obstruction of the proximal subclavian artery or of the brachiocephalic trunk and complete or incomplete forms of subclavian steal in the ipsilateral vertebral artery, blood flow in the basilar artery was investigated by transcranial Doppler sonography. With complete steal effect in respect of the vertebral artery, we found, contrary to other investigators, in most cases alterations of the flow in the basilar artery even at rest. These alterations are a systolic deceleration of flow velocity or an alternating flow directed towards the arm in systole and towards the brain in diastole. In about 40% of cases blood flow in the basilar artery could not be assessed, either because the depth of investigation reached was too low, or because--especially in cases with systolic deceleration in one vertebral artery--it was impossible to define the origin of the basilar artery.
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