J Cardiovasc Ultrasound.  2016 Sep;24(3):223-228. 10.4250/jcu.2016.24.3.223.

Myocardial Rotation and Torsion in Child Growth

• Kim CS
• Park S
• Eun LY

• KMID: 2353100
• DOI: http://doi.org/10.4250/jcu.2016.24.3.223

Abstract

BACKGROUND
The speckle tracking echocardiography can benefit to assess the regional myocardial deformations. Although, previous reports suggested no significant change in left ventricular (LV) torsion with aging, there are certain differences in LV rotation at the base and apex. The purpose of this study was to evaluate the change and relationship of LV rotation for torsion with aging in children.
METHODS
Forty healthy children were recruited and divided into two groups of twenty based on whether the children were preschool-age (2-6 years of age) or school-age (7-12 years of age). After obtaining conventional echocardiographic data, apical and basal short axis rotation were assessed with speckle tracking echocardiography. LV rotation in the basal and apical short axis planes was determined using six myocardial segments along the central axis.
RESULTS
Apical and basal LV rotation did not show the statistical difference with increased age between preschool- and school-age children. Apical radial strain showed significant higher values in preschool-age children, especially at the anterior (52.8 ± 17.4% vs. 34.7 ± 23.2%, p < 0.02), lateral (55.8 ± 20.4% vs. 36.1 ± 22.7%, p < 0.02), and posterior segments (57.1 ± 17.6% vs. 38.5 ± 21.7%, p < 0.01). The torsion values did not demonstrate the statistical difference between two groups.
CONCLUSION
This study revealed the tendency of higher rotation values in preschool-age children than in school-age children. The lesser values of rotation and torsion with increased age during childhood warrant further investigation.

Keyword

Children; Left ventricular rotation; Left ventricular torsion; Age difference

MeSH Terms

Aging
Child*
Echocardiography
Humans

Figure

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  Fig. 1 Measurement process of left ventricular rotation by two-dimensional speckle tracking echocardiographic imaging.

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  Fig. 2 Rotation data were acquired with speckle tracking echocardiography for (A) basal clockwise rotation, and (B) apical counterclockwise rotation, offline analysis at two-dimensional short axis view.

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