舒张期冠状动脉CTA管腔内密度衰减率预测心肌桥收缩压迫程度

发布时间：2018-02-27 00:23

本文关键词： 冠状动脉疾病体层摄影术 X线计算机心肌桥　出处：《中国医学影像技术》2017年08期 　论文类型：期刊论文

【摘要】：目的探讨舒张期冠状动脉CT血管成像(CCTA)参数壁冠状动脉管腔内密度衰减率预测心肌桥(MB)收缩压迫程度的价值。方法测量135例MB患者MB段以及MB近段冠状动脉管腔内平均CT值,计算壁冠状动脉管腔内密度衰减率(%)=(MB近端CT值-MB段CT值)/MB近端CT值×100%。以MB段管腔压迫致狭窄程度≥50%为显著收缩压迫,分析壁冠状动脉管腔内密度衰减率、MB长度、MB深度预测MB收缩压迫的效能。结果壁冠状动脉管腔内密度衰减率、MB长度在MB伴显著收缩压迫、MB伴轻度收缩压迫、MB不伴收缩压迫组患者中的差异均有统计学意义(P均0.05)。ROC曲线显示密度衰减率的最佳临界值为15%,曲线下面积为0.75[95%CI(0.67,0.82),P0.01],其诊断MB伴显著显著收缩压迫的准确率为73.3%。结论舒张期CT管腔内密度衰减率与MB收缩压迫程度有关,可通过该参数间接判断MB是否具有显著收缩压迫。
[Abstract]:Objective to evaluate the value of CCTA-parameters in predicting the degree of contraction and compression of myocardial bridge (MBM) in patients with myocardial bridge. Methods the mean CT values of MB segment and MB proximal coronary artery were measured in 135 patients with MB. The density attenuation rate in the lumen of the wall coronary artery was calculated. The CT value of the proximal end of MB and the CT value of the proximal end of the MB segment were calculated and the CT value of the proximal end of the MB segment was calculated. The degree of stenosis caused by the compression of the MB segment was more than 50%. The efficiency of MB length in predicting MB compression was analyzed. Results the density attenuation rate and MB length of mural coronary artery were measured in MB with significant contractile compression and mild compression without MB. The difference in systolic compression group was statistically significant (P < 0.05). ROC curve showed that the optimum critical value of density attenuation rate was 15, and the area under the curve was 0.75 [95CI0.67 0.82, P0.01]. The accuracy of diagnosis of MB with significant systolic compression was 73.3%. Conclusion diastolic CT is accurate. The attenuation rate of density in the lumen is related to the degree of contraction and compression of MB. This parameter can indirectly determine whether MB has significant contractile compression or not.
【作者单位】：上海交通大学附属第六人民医院放射科;
【分类号】：R541.1;R816.2

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