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


Journal of Medical Ultrasonics

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1999 - Vol.26

Vol.26 No.03

Original Article(原著)

(0111 - 0118)


Feasibility of a New Automated Real-time Wall Thickness Curve System With Two-dimensional Echocardiography

古本 渉, 水重 克文, 平尾 健一, 植田 孝, 岩藤 泰慶, 大森 浩二, 松尾 裕英

Wataru FURUMOTO, Katsufumi MIZUSHIGE, Kenichi HIRAO, Takashi UEDA, Yasuyoshi IWADO, Koji OHMORI, Hirohide MATSUO


Second Department of Internal Medicine, Kagawa Medical University, 1750-1 Miki-cho, Kita-gun, Kagawa 761-0793

キーワード : Automated wall thickness curve system, Left ventricular systolic function, Percent systolic wall thickening

Background.-The real-time wall thickness (WT) curve system is a new technique for automated measurement of left ventricular (LV) WT in an arbitrary direction in the two-dimensional echocardiogram.
Objective.-To test the feasibility of the real-time wall thickness curve system in the quantitative evaluation of LV wall motion.
Methods.-The WT curve system was used to measure percent systolic wall thickening (%WT) of the interventricular septum (IVS), lateral wall (LW), and posterior wall (PW) in parasternal long-or short-axis images quantitatively in 39 normal subjects. In 11 of these subjects, %WT measured with the new system was compared with that measured using conventional M-mode. Interobserver and intraobserver variation was also examined.
Results.-In the LV long-axis view, %WT was 48.5±25.5% at basal-IVS, 64.5±18.9% at mid-IVS, 53.2±21.3% at basal-PW, and 57.6±19.5% at mid-PW. At the papillary muscle level in the short-axis view, %WT was 79.6±20.6% at mid-IVS, 59.9±13.6% at PW, and 62.5±17.7% at LW. %WT values determined by this system and those determined by conventional M-mode correlated closely in IVS (r=0.99; p Conclusion.-The WT curve system enabled us to assess regional wall function as %WT. Because it excludes the effects of heart motion, this system may prove to be of great clinical benefit in evaluating regional wall function.