田辺 一明¹, 大野 美和¹, 浅沼 俊彦¹, 吉冨 裕之¹, 村上 陽¹, 佐野 和也¹, 島田 俊夫¹, 盛岡 茂文¹, 村上 林児²

Kazuaki TANABE¹, Miwa OHNO¹, Toshihiko ASANUMA¹, Hiroyuki YOSHITOMI¹, Yo MURAKAMI¹, Kazuya SANO¹, Toshio SHIMADA¹, Shigefumi MORIOKA¹, Rinji MURAKAMI²

¹島根医科大学第4内科, ²島根医科大学救急部

¹Fourth Department of Internal Medicine Shimane Medical University, ²Department of Emergency Care Shimane Medical University

キーワード : Balloon angioplasty, Fibromuscular hyperplasia, Intravascular ultrasound, Renovascular hypertension

Intravascular ultrasound (IVUS) is a new tomographic imaging method suitable for evaluating vascular-wall morphology. Accordingly, there is not yet sufficient data on results obtained with IVUS in cases of renovascular hypertension. Recognizing the need for more data, we assessed the effect of balloon angioplasty in two cases of renovascular hypertension. IVUS examination of these patients demonstrated thickened sonolucent zones at the site of angiographic stenosis. These thickened sonolucent zones were thought to represent medial fibromuscular hyperplasia. Improvement in the luminal area after balloon angioplasty in both cases was assumed to be associated with intimal and medial disruption. IVUS provides detailed images of abnormal wall morphology not obtainable with angiography in patients with renovascular hypertension.