Evaluation of left ventricular ejection fraction by tissue locus imaging.
The newly developed echocardiographic technique called "tissue locus imaging" (TLI) can visualize temporal series of images in a single picture by maintaining the display of previous images with a shading function; therefore, it can display the whole systolic shift of the mitral leaflets toward the apex in a single picture and can potentially offer useful information on left ventricular (LV) function. In 36 consecutive patients with varying degrees of LV dysfunction (15 with coronary artery disease, 9 with cardiomyopathy, 3 with hypertension, 2 with aortic stenosis, 1 with aortic regurgitation, and 6 controls), the systolic shift of the mitral leaflets (X) by TLI showed a significant correlation with the LV ejection fraction (Y) by 2-dimensional echocardiography (Y = 7.2 x+13, r(2) = 0.83, p <0.01). TLI enables the evaluation and visualization of LV systolic function by displaying the whole systolic shift of the mitral leaflets toward the apex.
Natsugoe
Kumiko
K
First Department of Internal Medicine, Kagoshima University School of Medicine, Kagoshima, Japan.
Otsuji
Yutaka
Y
Zhou
Xiaoyan
X
Zhang
Hui
H
Kisanuki
Akira
A
Yoshifuku
Shiro
S
Kumanohoso
Toshiro
T
Yuge
Keiko
K
Hamasaki
Shuichi
S
Biro
Sadatoshi
S
Minagoe
Shinichi
S
Ochi
Masumi
M
Tei
Chuwa
C
D000328:Adult; D000368:Aged; D009202:Cardiomyopathies / Q000503:physiopathology*; D003327:Coronary Disease / Q000503:physiopathology*; D004452:Echocardiography / Q000379:methods*; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D013318:Stroke Volume; D016277:Ventricular Function, Left