Online Journal
IF値: 1.878(2021年)→1.8(2022年)


Journal of Medical Ultrasonics

にて英文誌のFull textを閲覧することができます.


2000 - Vol.27

Vol.27 No.05

Original Article(原著)

(0779 - 0784)

左室径及び左室収縮機能評価におけるFree Angle Mモード心エコー図法の有用性

Usefulness of Free-Angle M-mode Echocardiography in Assessing Left Ventricular Dimension and Left Ventricular Systolic Function

劉 金耀1, 田中 伸明2, 村田 和也1, 藤野 隆1, 上田 佳代1, 木村 和美1, 山本 卓生1, 岩立 光生1, 久岡 隆行1, 谷川 武人1, 松﨑 益德1

Jinyao LIU1, Nobuaki TANAKA2, Kazuya MURATA1, Takashi FUJINO1, Kayo UEDA1, Kazumi KIMURA1, Takuo YAMAMOTO1, Mitsuo IWATATE1, Takayuki HISAOKA1, Taketo TANIGAWA1, Masunori MATSUZAKI1

1山口大学医学部内科学第二講座, 2山口大学附属病院検査部

1Second Department of Internal Medicine Yamaguchi University School of Medicine , 2Department of Clinical Laboratory Yamaguchi University Hospital

キーワード : Left ventricular systolic function , M-mode echocardiography

Objectives To assess the usefulness of free-angle M-mode echocardiography in measuring left ventricular (LV) dimension and global systolic function.
Background The validity of conventional M-mode echocardiography in assessing LV dimension and global systolic function is well known; the incidental angle between the M-mode cursor and true LV minor axis diameter, however, is a potential cause of measurement error. Free-angle M-mode echocardiography may overcome the limitation of M-mode cursor arrangement in conventional M-mode echocardiography.
Methods Thirteen normal volunteers and 10 patients in whom abnormal left ventricular wall motion was not detected by echocardiography (mean age, 53±17 years) were enrolled in this study. Conventional and free-angle M-mode echocardiographic images of the LV were obtained by echocardiography (ALOKA SSD-55OO) using a 2.5-MHz transducer, and the LV end-diastolic (LVDd) and end-systolic (LVDs) dimensions were measured by the leading-edge method. LV end-diastolic and end-systolic volumes were calculated using a formula by Teichholz, and the LV ejection fraction (LVEF) was obtained. Data from conventional M-mode echocardiography and free-angle M-mode echocardiography were then compared.
Results Measurements obtained with conventional M-mode and free-angle M-mode echocardiography were strongly correlated. Correlation coefficients for LVDd, LVDs, and LVEF were 0.98, 0.98, and 0.96, respectively (p Conclusions Assessment of left ventricular dimension and global systolic function with free-angle M-mode can be as accurate as conventional M-mode in subjects in whom left ventricular wall motion abnormality is not detectable by echocardiogram. Moreover, when there is improper M-mode cursor direction in conventional echocardiography, free-angle M-mode echocardiography can assess global left ventricular systolic function more accurately and conveniently than conventional M-mode echocardiography.