Study on the normal reference value of the angle between the left ventricular inflow and outflow tract in normal fetuses in the second and third trimesters
10.3760/cma.j.cn131148-20231222-00309
- VernacularTitle:正常中晚孕胎儿左心室流入道与流出道夹角的正常参考值
- Author:
Heyi TAN
1
;
Shi ZENG
;
Yang YANG
;
Dan ZHOU
;
Yushan LIU
;
Jiawei ZHOU
;
Ganqiong XU
Author Information
1. 中南大学湘雅二医院超声科，长沙 410011
- Keywords:
Echocardiography;
Fetus;
Angle between fetal left ventricular inflow and outflow tract;
Cardiac axis;
Cardiac size
- From:
Chinese Journal of Ultrasonography
2024;33(5):421-426
- CountryChina
- Language:Chinese
-
Abstract:
Objective:To establish the reference value of the angle between the left ventricular inflow and outflow tract (LIOA) in normal fetuses in the second and third trimesters, and observe the correlation between fetal LIOA and gestational age, cardiac axis, cardiac size, and estimated fetal weigh (EFW).Methods:Fetal LIOA in normal fetuses with gestational age from 16 weeks to 39 + 6 weeks were obtained prospectively by two-dimensional ultrasound in the Second Xiangya Hospital from November 2022 to April 2023. Pearson′s correlation coefficient was used to analyze the correlation between fetal LIOA and gestational age, cardiac axis, cardiovascural size and EFW. Results:The LIOA range of 651 normal fetuses was (44.39±7.67)°, and it was found that LIOA was not related to gestational age. LIOA mildly positively correlated with the cardiac axis ( r=0.22, P<0.05) while not correlated with gestational age, cardiovascural size or EFW (all P>0.05). Conclusions:The range of LIOA in normal fetuses were established. Fetal LIOA is constant in the second and third trimesters and it is mildly positively correlated with the cardiac axis. Evaluating fetal LIOA may also provide information for future research on the fetal aortic hemodynamic development.
