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Journal of Medical Ultrasonics

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1997 - Vol.24

Vol.24 No.11

Original Article(原著)

(1749 - 1754)


Intravascular Ultrasound Findings of Pulmonary Thromboembolus in Clinical and Autopsy Cases

鯉江 伸1, 松山 裕宇1, 岩瀬 正嗣1, 武田 京子2, 加藤 千博1, 長谷川 和生1, 木村 美由紀1, 野村 雅則1, 小出 章博1, 山本 春光1, 畑田 綾子1, 渡辺 佳彦1, 菱田 仁1

Shin KOIE1, Hiroyuki MATSUYAMA1, Masatsugu IWASE1, Kyoko TAKEDA2, Chihiro KATO1, Kazuo HASEGAWA1, Miyuki KIMURA1, Masanori NOMURA1, Akihiro KOIDE1, Harumitsu YAMAMOTO1, Ayako HATADA1, Yoshihiko WATANABE1, Hitoshi HISHIDA1

1藤田保健衛生大学医学部内科, 2名古屋記念病院循環器科

1Department of Internal Medicine, Fujita Health University, 2Division of Cardiology, Nagoya Memorial Hospital

キーワード : Autopsy , Intravascular ultrasound (IVUS) , Pulmonary thromboembolism

We attempt to clarify those intravascular ultrasound (IVUS) findings indicative of fresh and chronic pulmonary thromboemboli (PTE). Method: We studied PTE in the acute and chronic phases in 14 clinical and 7 autopsy cases of IVUS imaging using a 20 MHz mechanical transducer. Results: In the acute phase, large PTE attached to the proximal pulmonary artery were depicted as echolucent masses with irregular echogenic surfaces protruding into the lumens, which the IVUS findings confirmed in autopsy cases of acute PTE. Two subacute cases showed PTE that appeared as slightly echolucent crescent-shaped masses with smooth echogenic surfaces that narrowed the lumens. Chronic recurrent PTE associated with pulmonary hypertension had a highly echogenic crescent-shape with partial bulging of the vessel wall at the site of persistent thrombi. Similar highly echogenic images of PTE were noted also in the autopsy cases of chronic PTE. Conclusion: IVUS can be used to distinguish between acute and chronic PTE.