The characteristic of left ventricular twist changed from infancy to the elder assessed by speckle tracking echocardiography
- VernacularTitle:超声斑点追踪显像评估新生儿至老年人左心室扭转运动的变化特点
- Author:
Yi ZHANG
;
Qichang ZHOU
;
Lin ZOU
;
Ling LI
;
Yi TAN
;
Danming CAO
;
Leiqi TIAN
- Publication Type:Journal Article
- Keywords:
Echocardiography;
Ventricular function,left;
Torsion;
Age
- From:
Chinese Journal of Ultrasonography
2008;17(5):369-373
- CountryChina
- Language:Chinese
-
Abstract:
Objective To assess the characteristic of left ventricular(LV) twist changed from infancy to the elder,in order to determine the normal value of LV twist in different age group.Methods After acquired basal and apical LV short-axis images in 293 healthy volunteers (aged 15 days to 72 years) by 2-dimensional echocardiography, speckle tracking echocardiography was used to analysis LV twist motion offline.The peak apical rotation (PAr), peak basal rotation (PBr), peak LV twist (Ptw), peak LV twist normalized by LV length ( PtwN), peak untwisting velocity ( PutwV), isovolumic untwisting% ( Iutw% ) in different group were compared.Results Reliable LV twist measurements were obtained in 274 volunteers.Different LV twist values were noted according to age.Ptw increased gradually with advancing age, when normalized by LV length, PtwN showed higher values before 3 years old and 25 to 45 years old.PutwV increased with aging from infancy to 25 years old, and leveled off from 25 to 45 years old, then decreased with advancing age.Iutw% was lowest before 3 years old,and increased gradually from 25 to 45 years old,then decreased with aging.Conclusions speckle tracking echocardiography can be used to noninvasively and exactly assess LV twist with high feasibility.The effect of aging on LV twist may reflect the process of maturational and adaptive modulation of LV torsional biomechanics from infancy to the elder.
