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To clarify current changes in the patterns of carotid atherosclerosis in Japan, carotid ultrasonographic findings in Japanese male patients with aortic aneurysm were compared between two groups examined in different periods. The first group was recruited from 42 consecutively examined patients in 1997, while the second group consisted of 40 consecutive patients from September, 2001 to January, 2002. Carotid lesions were analyzed by computer, and classified into three types based on the texture: echolucent, hyperechoic, and heterogeneous types. The mean age of the first group was 72 years, similar to that of the second group. In the first group, cigarette smoking was frequently noted, while the mean BMI was greater and IHD and CVD were frequent in the second group. Fifty carotid lesions were seen in each group. Severe stenosis and hypoechoic type lesions were more frequent in the second group than in the first group. These findings indicated that hypoechoic-type lesions, which are considered to be lipid deposition, hemorrhage, or loose fibrous tissue, and severe stenosis, were increased in the more recent group. This predicted that circulatory disturbance due to unstable atherosclerotic lesions may increase in the future among the elderly because carotid lesions reflect vascular change in other organs.

Changes in Carotid Atherosclerosis Patterns Detected by Ultrasonography in Japanese Elderly Patients with Aortic Aneurysm