Roberson David A, Cui Wei
Heart Institute for Children, Hope Children's Hospital, Oak Lawn, Illinois 60453, USA.
J Am Soc Echocardiogr. 2007 Jun;20(6):764-70. doi: 10.1016/j.echo.2006.11.002.
The right ventricular (RV) Tei index (RVTX) has been used to analyze systolic and diastolic global RV function in various congenital and acquired cardiac abnormalities in children. We conducted a study to determine the effects of the methods of Doppler tissue imaging (DTI) versus pulse wave Doppler (PWD) and age, body surface area (BSA), and heart rate on the RVTX in a population of 308 children with normal echocardiogram findings. Participants ranged in age from 1 day to 18 years, with BSA from 0.08 to 2.4 m2 and heart rate from 46 to 182/min. The RVTX was calculated by both DTI and PWD in each patient during a single echocardiographic examination. RVTX-DTI = 0.37 +/- 0.05 (mean +/- SD) versus RVTX-PWD = 0.34 +/- 0.06 were slightly but statistically different (P < .001). Univariate linear regression analysis showed age and BSA both had small but significant positive effects on both the RVTX-DTI and RVTX-PWD, and heart rate had a small but significant negative effect on both techniques (all with P < .01). By multivariate regression analysis RVTX-DTI was significantly affected only by the BSA and the RVTX-PWD only by age (both with P < .05). Therefore, one must consider the method of RVTX measurement, the BSA for RVTX-DTI, and the age for RVTX-PWD to accurately assess RVTX values.
右心室（RV）Tei指数（RVTX）已被用于分析儿童各种先天性和后天性心脏异常中的右心室整体收缩和舒张功能。我们进行了一项研究，以确定在308例超声心动图检查结果正常的儿童群体中，多普勒组织成像（DTI）与脉冲波多普勒（PWD）方法以及年龄、体表面积（BSA）和心率对RVTX的影响。参与者年龄从1天至18岁不等，BSA为0.08至2.4平方米，心率为46至182次/分钟。在单次超声心动图检查期间，通过DTI和PWD分别计算每位患者的RVTX。RVTX-DTI = 0.37±0.05（均值±标准差），而RVTX-PWD = 0.34±0.06，两者略有差异但具有统计学意义（P <.001）。单变量线性回归分析显示，年龄和BSA对RVTX-DTI和RVTX-PWD均有微小但显著的正向影响，心率对这两种技术均有微小但显著的负向影响（均P <.01）。通过多变量回归分析，RVTX-DTI仅受BSA显著影响，RVTX-PWD仅受年龄显著影响（均P <.05）。因此，为准确评估RVTX值，必须考虑RVTX测量方法、用于RVTX-DTI的BSA以及用于RVTX-PWD的年龄。
