脳血管障害:研究と診療の進歩(11) : 脳血管障害の超音波診断:頸動脈エコー

概要

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Carotid ultrasonography is useful for prediction of ischemic stroke and heart disease. Increasing of the maxi-mum common carotid intima-media thickness (IMT-Cmax) is associated with vascular events in older patients. Internal carotid artery (ICA) should be diagnosed as 50% stenosis when ICA peak systolic velocity (PSV) is greater than 150 cm/sec and ≧70% stenosis when ICA PSV is more than 200 cm/sec. Carotid plaque ulceration and echolucent plaque are associated with stroke. Carotid ultrasonography should be performed in not only ischemic stroke patients but also older patients.