SUBCLAVIAN BRUITS IN PATIENTS WITH CEREBROVASCULAR DISEASES

• Published in: Japanese Journal of National Medical Services Vol. 38; no. 11; pp. 1037 - 1040
• Main Authors: ASHIDA, Keiichi, IMAIZUMI, Masatoshi, NISHI, Osamu, NAKANO, Takashi, SUGII, Michio, HIRANO, Sho, HAYASHI, Toru, NAKAGAWA, Keinosuke
• Format: Journal Article
• Language: Japanese
• Published: Japanese Society of National Medical Services 1984
• ISSN: 0021-1699; 1884-8729
• DOI: 10.11261/iryo1946.38.1037

The relationship between bruits over the carotid arteries in the neck and occlusive lesions of the extracranial carotid arteries has been recognized. The diagnostic implication of carotid bruits as an indicator of extracranial arterial lesion has been emphasized. However, less attention has been paid to the bruits over the subclavian artery. In the present study, nine patients with bruits over the subclavian artery were examined to study the significance and the difference from carotid bruits. From angiographical findings of the subclavian artery, two patients had stenosis of more than fifty percent. Six patients had wall irregularity. One patient had normal findings. From angiographical findings of the internal carotid artery, two patients had stenosis of more than fifty percent. Two patients had stenosis of less than fifty percent. Two patients had wall irregularity. Three patients had normal findings. In six patients with wall irregularity of the subclavian artery, bruits over the subclavian artery were always audible in one patient. Bruits were sometimes audible in five patients. In four patients with stenosis of less than fifty percent or wall irregularity of the internal carotid artery, bruits over the internal carotid artery were sometimes audible in one patient. Bruits were not audible in three patients. Bruits over the subclavian artery were more frequently audible in patients with more mild lesions of the subclavian artery than those of the internal carotid artery. In addition, the chances of bruits over the subclavian artery were more variable. It is suggested that these results are due to the differences of anatomical constitution, flow velocity and hemodynamics of the subclavian artery and the internal carotid artery