Evaluation of left ventricular bulk rotation and untwisting in transplanted hearts using two-dimensional speckle tracking imaging: a preliminary study
10.3760/cma.j.issn.1004-4477.2013.12.002
- VernacularTitle:二维超声斑点追踪成像评价心脏移植术后左心室整体扭转及解旋运动的初步研究
- Author:
Jun YOU
;
Wei HAN
;
Mingxing XIE
;
Xiaojuan QIN
;
Lingyun FANG
;
Xiaofang LU
;
Yu WU
- Publication Type:Journal Article
- Keywords:
Echocardiography;
Heart transplantation;
Ventricular function,left;
Speckle tracking imaging
- From:
Chinese Journal of Ultrasonography
2013;22(12):1017-1021
- CountryChina
- Language:Chinese
-
Abstract:
Objective To evaluate the changes of left ventricular (LV) bulk rotation and untwisting in transplanted hearts using 2-dimensional speckle tracking imaging(STI).Methods Basal and apical LV short-axis images were acquired in 15 heart transplant recipients 3 months post surgery(HT group) and 56 healthy control subjects.Basal and apical rotation versus time profiles were drawn using 2-dimensional STI software.Appropriate values were chosen from the dataset obtained and compared between two groups.Results ①Compared with the control group,the heart rate,anterior-posterior diameter of left atrium,enddiastolic interventricular septum thickness,left ventricular posterior wall thickness,isovolumic relaxation time and E/e ratio were significantly increased,e and a values were decreased significantly in HT group (P ＜ 0.05).② No significant difference was noticed in the peak degrees of LV bulk rotation,the degrees of LV bulk rotation at the time of aortic valve closure and mitral valve opening (P =0.700,0.984,0.495,respectively) between 2 groups.In both groups,systolic rotation reached its maximum at end-systole [(96.1 ± 8.4) ％ in HT group vs (100.5 ± 6.3) ％ in control group,P =0.065].③Significant decreases in untwisting rate and trend untwisting variables were observed in the HT group(P ＜0.001).Conclusions 3 months after transplanted,left ventricular bulk rotation of cardiac allografts remained normal,and significant decreases in both untwisting rate and trend untwisting variables showed that the diastolic function of cardiac allografts was impaired.
