| 刘晓伟,满婷婷,何怡华.超声评估主动脉缩窄胎儿主动脉弓狭窄部位的血流动力学特点[J].中国医学影像技术,2017,33(2):251~254 |
| 超声评估主动脉缩窄胎儿主动脉弓狭窄部位的血流动力学特点 |
| Ultrasound in evaluation on hemodynamic characteristics in stenosis site of aortic arch in fetus with aorta coarctation |
| 投稿时间：2016-07-22 修订日期：2016-11-10 |
| DOI：10.13929/j.1003-3289.201607095 |
| 中文关键词: 主动脉缩窄 胎儿心脏 超声心动描记术 主动脉弓 血流动力学 |
| 英文关键词:Aortic coarctation Fetal heart Echocardiography Aortic arch Hemodynamics |
| 基金项目:“扬帆”计划临床技术创新项目（XMLX201604）。 |
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| 中文摘要: |
| 目的 通过胎儿超声心动图动态评估孕中晚期主动脉缩窄（COA）胎儿主动脉弓狭窄部位血流动力学特点。方法 回顾性分析本院诊断为COA的45胎胎儿的孕中晚期（24~38+6周）不同孕周超声心动图资料，测量主动脉弓缩窄处收缩期峰值流速（SPv）、舒张期末流速（EDv）、搏动指数（PI），并与同孕周正常胎儿进行比较。结果 COA胎儿中孕期至晚孕初期（24~<32周）主动脉弓部的SPv与EDv较正常胎儿增快，PI减低（P均<0.05）；血流频谱形态表现为舒张期前向血流量较正常胎儿增多。晚孕中后期（32~38+6周）主动脉弓狭窄处的SPv、Edv及PI值与正常胎儿差异无统计学意义（P均>0.05）；血流频谱形态多数表现为收缩末期反向血流信号。结论 COA胎儿主动脉弓部狭窄处的血流状态在不同孕周可表现不同，采用频谱多普勒参数诊断COA时还需结合胎儿孕周大小进行评价。 |
| 英文摘要: |
| Objective To evaluate the hemodynamic characteristics in stenosis site of aortic arch in fetus with coarctation of aorta (COA) using echocardiography.Methods Echocardiographic data of 45 fetuses with prenatal diagnosis of COA in the middle to late gestation age (24-38+6 weeks) were analyzed retrospectivly. The systolic maximum peak velocity (SPv), end diastolic velocity (EDv), pulsatility index (PI) of the stenostic segment were measured and compared with normal fetus in the same gestational age.Results The SPv and EDv of aortic arch increased, while PI decreased in COA fetuses than those in normal fetuses from 24-<32 weeks gestation age (all P<0.05). The aortic arch flow spectrum appeared a run-off character of diastolic blood flow. The SPv and EDv and PI value between the COA and normal fetuses in 32-38+6 weeks had no significant statistical differences (all P>0.05). The aortic arch flow spectrum showed retrograde flow pattern in end systole to early diastole.Conclusion The blood flow pattern of the stenostic segment of aortic arch in COA fetuses has different characteristics in different gestation weeks. Different gestation week should also be focused on when using pulse Dopper measurements in diagnosis of COA. |
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