| 摘要: |
| 目的 应用血流向量成像技术（Vector flow mapping，VFM）评价房间隔缺损（Atrial septal defect，ASD）患者舒张期左、右心室腔内血流动力学变化。方法 选取继发孔型ASD成人患者26例和对照组31例。获取常规超声参数及VFM参数：左、右心室各节段舒张期峰值流速（Diastolic velocity，Vd）、瞬时正向流量（Diastolic instantaneous flow，IQ ）、正向总流量（Diastolic total flow，TQ ）和涡量指标进行统计分析。结果 ASD组左室舒张期基底段和中间段IQ 、基底段TQ 小于对照组（P<0.05），右室舒张期各节段Vd、IQ 、TQ 均明显大于对照组（P<0.05）；左室中间段和心尖段涡量及右室各节段涡量均大于对照组（P<0.05）。结论 成人ASD患者心室流速、流量及涡量与正常成人存在显著性差异，VFM是一种无创性评价心腔内血流动力学的有效手段。 |
| 关键词: 超声心动图 血流向量成像 房间隔缺损 血流动力学 |
| DOI： |
| 投稿时间：2016-12-07修订日期：2017-01-03 |
| 基金项目:湖北省分子影像重点实验室开放基金 |
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| Assessment of ventricular diastolic blood flow structure by vector flow mapping in atrial septal defect |
| WU WEN QIAN,XIE MING XING |
| () |
| Abstract: |
| Objective To assess the changes of left and right ventricular diastolic hemodynamics in patients with atrial septal defect by enhanced Vector flow mapping. Methods 26 adult ASD patients and 31 control subjects were enrolled in this study. The conventional parameters and VFM parameters: The Left and right ventricular diastolic peak velocity、diastolic flow、diastolic total flow and vorticity in apex-mid-basis segment were analyzed by VFM technique. Results The left ventricular diastolic IQ of basal and apical segment、TQ of basal segment were lower（P<0.05）than those of the control group, while right ventricular diastolic Vd、IQ and TQ of all segments were higher(P<0.05) compared with the control group. The left ventricular vorticity of middle and apical segment and right ventricular vorticity of all segments are higher（P<0.05）than those in control group．Conclusions The positive blood flow and vorticity of the left and right ventricle are different between adult ASD patients and normal subjects. Vector flow mapping is an ideal and noninvasive method to evaluate the hemodynamics of cardiac chambers. |
| Key words: Echocardiography Vector flow mapping Atrial septal defect Hemodynamics |
