Evaluation of left ventricular systolic longitudinal strain in healthy children by two dimensional speckle tracking imaging / 中华超声影像学杂志

ABSTRACT

Objective To assess the characteristic of left ventricular systolic longitudinal strain(SL) in healthy children and its relationship with age by speckle tracking imaging(STI). Methods One hundred and thirty healthy children were divided into 5 groups classing 0 to 3 years old children together as group A,and 3 to 5 years old as group B,6 to 9 years old as group C,10 to 12 years old as group D,13 to 18 years old as group E. SL of left ventricular wall during the systole was measured. Results ①The apical SL of left ventricular wall during the systole was larger than the middle one and the basal one. Significant differences were found between apical and basal segments in group A. The apical segments of posterior wall, inferior wall ,lateral wall and ventricular septum presented significant differences with the basal one in group D. Significant difference was found between apical segments of the posterior ventricular septum and the basal one in group E. ②These parameters of the five groups trend to decrease as well as the growth of age . Compared with group D and E,SL of left ventricular wall during the systole were significantly increased in group A except anterior wall,and SL of left ventricular wall during the systole were significantly increased in group B except apical segments of the posterior wall and apical segments of the anterior ventricular septum. ③The intra-observer and inter-observer variabilities were 2.0% and 2.5% for SL measured by STI in two chamber view,1.9% and 2.3% SL in three chamber view, and 2.1% and 2. 8% in four chamber view. Conclusions The parameters of strain were not similar in left ventricular different walls and segments,and there is some relationship between SL and increasing-age.