三宅 仁, 吉川 純一, 吉田 清, 赤阪 隆史, 赤土 正洋, 穂積 健之, 本多 康浩, 福田 久也

Shinobu MIYAKE, Junichi YOSHIKAWA, Kiyoshi YOSHIDA, Takashi AKASAKA, Masahiro SHAKUDO, Takeshi HOZUMI, Yasuhiro HONDA, Hisaya FUKUDA

神戸市立中央市民病院循環器センター

Department of Cardiology, Kobe General Hospital

キーワード : Atherosclerotic change, Intravascular ultrasound

To assess atherosclerotic changes in the descending aorta (descending thoracic aorta, suprarenal and infrarenal abdominal aorta) and the common iliac artery, 101 aortographically normal subjects were studied using an 8 F, 15-MHz intravascular ultrasound catheter (IVUS). Atherosclerotic changes were evaluated using the atheroma score (extent score of atheroma; ESA), the calcification score (extent score of calcification; ESC), and % area stenosis (% ST). We separated the intraluminal area of the IVUS images into eight equal segments when we observed an atheromatous plaque (or calcification). ESA or ESC were then evaluated on a scale of 0 to 8 on each sectional plane, according to their circumferential arc, and % ST was calculated as ratio of intraluminal area to the area of the adventitia. Atherosclerotic changes, ESA, and % ST were greater in the lower part of the descending aorta and the common iliac artery than in the thoracic aorta (p