冠状动脉病变程度对左室扭转角度及心功能影响的斑点追踪研究

发布时间：2018-07-24 09:10

【摘要】：目的探讨急性心肌梗死患者冠状动脉病变程度,对左室心肌扭转角度及心功能的影响。方法使用二维超声斑点追踪技术分别测量左室短轴切面心尖水平和瓣环水平各段心尖旋转角度峰值、心底旋转角度峰值、扭转角度峰值等指标,分析冠状动脉病变程度对扭转角度及心功能的影响,并测量左室内径及左室容积等参数。结果 (1)与对照组比较,心肌梗死各组各节段扭转角度、左室整体扭转角度及LVEF均下降(P0.05)。(2)直线相关分析,心肌梗死组冠脉病变程度与LVEF有较好的相关性,r=0.816(P0.05)。(3)ROC曲线显示,以左室整体扭转角度15.0°为临界值,预测心肌梗死病变累及双支曲线下面积为0.846,预测左室射血分数45%的曲线下面积为0.738。结论急性心肌梗死患者随冠状动脉病变程度加重,左室心肌扭转角度和心功能明显下降。
[Abstract]:Objective to investigate the effect of coronary artery lesion on left ventricular torsion angle and cardiac function in patients with acute myocardial infarction. Methods two dimensional ultrasonic speckle tracing technique was used to measure the peak value of apex rotation angle, heart rotation angle and torsion angle on the left ventricular short axis section level and valve annulus level, respectively. The effects of coronary artery lesion on torsion angle and cardiac function were analyzed, and left ventricular diameter and left ventricular volume were measured. Results (1) compared with the control group, the torsion angle of each segment of myocardial infarction, the global torsion angle of left ventricle and LVEF decreased (P0.05). (2) linear correlation analysis. There was a good correlation between the degree of coronary artery lesion and LVEF in myocardial infarction group (P0.05). (3) ROC curve. The critical value of global torsion angle of left ventricle was 15.0 掳. The area under the double-branch curve and the area under the curve with 45% left ventricular ejection fraction were predicted to be 0.846 and 0.73838, respectively. Conclusion with the severity of coronary artery lesion, the left ventricular torsion angle and cardiac function decreased significantly in patients with acute myocardial infarction.
【作者单位】：新疆医科大学第二附属医院超声科;新疆医科大学第二附属医院影像中心;
【基金】：新疆维吾尔自治区自然科学基金资助项目(No.2012211A032)
【分类号】：R542.22;R445.1

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