Online Journal
電子ジャーナル
IF値: 1.8(2022年)→1.9(2023年)

英文誌(2004-)

Journal of Medical Ultrasonics

一度このページでloginされますと,Springerサイト
にて英文誌のFull textを閲覧することができます.

cover

1987 - Vol.14

Vol.14 No.06

Case Report(症例報告)

(0600 - 0606)

超音波ドプラー法による心室中部閉塞性肥大型心筋症の左室内血流動態の検討

Intraventricular Flow Profiles in Patients with Hypertrophic Cardiomyopathy with Mid-Ventricular Obstruction Using Doppler Echocardiography

中村 隆志1, 北村 浩一2, 古川 啓三2, 辻 康裕1, 高橋 徹1, 国重 宏1, 下尾 和敏2, 東 秋弘2, 朝山 純2, 勝目 紘2

Takashi NAKAMURA1, Hirokazu KITAMURA2, Keizo FURUKAWA2, Yasuhiro TSUJI1, Tohru TAKAHASHI1, Hiroshi KUNISHIGE1, Kazutoshi SHIMOO2, Akihiro AZUMA2, Jun ASAYAMA2, Hiroshi KATSUME2

1松下記念病院第三内科, 2京都府立医科大学第二内科

1The Third Department of Internal Medicine, Matsushita Memorial Hospital, 2The Second Department of Internal Medicine, Kyoto Prefectural University of Medicine

キーワード : Hypertrophic cardiomyopathy, Doppler echocardiography, Mid-ventricular obstruction

To assess the intraventricular flow conditions in 4 patients with hypertrophic cardiomyopathy with mid-ventricular obstruction, we utilized Doppler echocardiography including real-time color flow imaging, continuous and pulsed wave Doppler ultrasounds. By color flow mapping, obstructive signals consisted of rapid-velocity aliasing and mosaic-colored jets appeared at the mid-ventricular level during both systole and diastole. High velocity jets with late systolic peak ranged from 2.3 to 4.0 m/sec (mean 3.3) by continuous wave Doppler suggested the existence of systolic pressure gradient at the midventricle. In addition, peak mitral rapid filling velocities ranged from 25 to 45 cm/sec (mean 38) were accellerated at the midventricle, ranged from 75 to 135 cm/sec (mean 114) by pulsed wave mapping. Peak flow velocities during isovolumic relaxation period were also rapid at the mid-ventricle. These findings indicated the existence of characteristic intraventricular flows in mid-ventricular obstruction during not only systole but diastole.
Doppler echocardiography is safe and useful technique to assess the intraventricular flow conditions in mid-ventricular obstruction.