Concluding Remarks on the Epidemiology of Atherosclerosis
As some speakers have described, risk factors of coronary atherosclerosis may not be exactly the same as those of aortic atherosclerosis. Several years ago a collaborative study by two study groups, Kyushu University and University of Minnesota, on stroke and cerebral atherosclerosis in the Japanese and Caucasian populations, showed that atherosclerosis of the circle of Willis was of the same degree — or even more advanced — in the Japanese compared with that in the Minnesota subjects. Cerebral angiograms of the stroke patients showed that the Caucasians had more frequent occlusive lesions in the extracranial arteries than the Japanese, and the situation was reversed for the frequency of severe occlusions in the intracranial arteries. Racial differences may explain these disparities.