増山 理¹, 佐藤 洋¹, 南都 伸介¹, 中 真砂土¹, 谷浦 弘一¹, 平山 篤志¹, 児玉 和久¹, 岡本 貴隆², 森田 紀代美², 北畠 顕³, 井上 通敏³, 鎌田 武信³

Tohru MASUYAMA¹, Hiroshi SATO¹, Shinsuke NANTO¹, Masashi NAKA¹, Koichi TANIURA¹, Atsushi HIRAYAMA¹, Kazuhisa KODAMA¹, Kiyotaka OKAMOTO², Kiyomi MORITA², Akira KITABATAKE³, Michitoshi INOUE³, Takenobu KAMADA³

¹大阪警察病院心臓センター, ²大阪警察病院臨床検査科, ³大阪大学医学部第一内科

¹The Cardiovascular Division, Osaka Police Hospital, ²The Department of Clinical Laboratory, Osaka Police Hospital, ³The first Department of Internal Medicine, Osaka University Medical School

キーワード : Doppler echocardiography, Aortic regurgitation, Half-time index, Flow mapping, Aortography

　Pulsed Doppler flow mapping method is widely used to evaluating aortic regurgitation. Recently, half-time of aortic regurgitant flow velocity was determined by continuous-wave Doppler echocardiography and was reported to be useful to evaluate aortic regurgitation. In this study, utility of the two methods were compared with each other by using angiographic grading as a standard in 32 patients with aortic regurgitation. Both methods are demonstrated to be useful for evaluating the severity of aortic regurgitation in patients without associated mitral valve diseases. In patients with associated mitral valve diseases, the degree of aortic regurgitation was overestimated by the pulsed Doppler flow mapping method in 5 of 10 patients with moderate aortic regurgitation; however, it was accurately evaluated with the half-time in 8 of them. Thus, we conclude that continuous-wave Doppler echocardiography is simple and accurate method for noninvasively evaluating the severity of aortic regurgitation, and that it seems to be inappropriate to evaluate the severity of aortic regurgitation only by the pulsed Doppler flow mapping method in patients with associated mitral valve diseases.