Evaluation of the left ventricular longitudinal strain in patients with myocardial ischemia by two-dimensional speckle tracking imaging
10.3760/cma.j.issn.1004-4477.2011.08.002
- VernacularTitle:二维斑点追踪技术评价心肌缺血患者左室心肌纵向应变
- Author:
Qing DENG
;
Qing ZHOU
;
Jia HUANG
;
Jinling CHEN
;
Bo HU
;
Yan JIA
;
Tian WU
;
Ruiqiang GUO
- Publication Type:Journal Article
- Keywords:
Echocardiography;
Myocardial ischemia;
Ventricular function,left;
Speckle tracking imaging
- From:
Chinese Journal of Ultrasonography
2011;20(8):648-651
- CountryChina
- Language:Chinese
-
Abstract:
Objective To assess left ventricular(LV) longitudinal strain in patients with coronary heart disease by two-dimensional speckle tracking imaging (2DSTI),and to explore the clinical value of 2D longitudinal strain in detecting myocardial ischemia. Methods Forty-four patients with coronary heart disease (CHD group) and 28 age-matched subjects (control group) were enrolled into this study. The two-dimensional data were obtained in apical 4-chamble, 2-chamber and long axis view. And the longitudinal strains of every segments, the average longitudinal strain of LV 18 segments (SL18), the average longitudinal strain of 12 segments (SL12,excluded the 6 apical segments) were analyzed. Results In the patients with CHD, the longitudinal strain of ischemia segments and the global LV longitudinal strain were significantly decreased than that of the control subjects. Both in patients with CHD and in control subjects,the longitudinal strains in apical segments were higher than that of middle and basal segments. There was significant difference between SL18 and SL12 ( P=0.027 in CHD group and P =0.003 in control group).Receiver operating curve (ROC) analysis demonstrated that the cutoff point of SL18 to detect myocardial ischemia was - 18.8％ (sensitivity 80.2％ and specificity 74.1％ ) ,and the cutoff point of SL12 to detect myocardial ischemia was - 17.8％ ( sensitivity 81.7％ and specificity 85.6％ ). Conclusions 2D longitudinal strain was sensitive to detect myocardial ischemia, SL12 was better than SL18 in detecting myocardial ischemia. 2DSTI might be useful for identifying patients with severe CHD.
