Shandong Medical Imaging Research Institute, Shandong University, Road Jing-Wu, No. 324, Jinan, 250021, PR China.
Clin Imaging. 2010 Mar-Apr;34(2):83-8. doi: 10.1016/j.clinimag.2009.05.010.
To investigate the correlation between the degree of systolic compression of mural coronary artery (MCA) and the length and depth of myocardial bridging (MB) with dual-source computed tomography (DSCT).
The length and depth of MB were measured from diastolic phase. All datasets were reconstructed in 5% steps of R-R interval. The optimum phases were chosen where the maximal and minimal diameters were shown. The degree of systolic compression of MCA was calculated. The correlation between length and depth of MB and the degree of systolic compression of MCA were analyzed by Pearson test.
The minimal diameters were found in 27 sites (90.0%) from 30% to 35% R-R interval, and the maximal diameters were found in 27 sites (90.0%) from 70% to 80% R-R interval. The correlation between systolic compression of MCA and length of MB was not significant (r=0.096, P=.613); however, the correlation between systolic compression of MCA and the depth of MB was significant (r=0.675, P<.01).
The minimal and maximal diameters of MCA are usually demonstrated in 30-35% and 70-80% R-R reconstruction interval, respectively. The degree of systolic compression of MCA correlates well with the depth of MB.
利用双源 CT（DSCT）探讨壁冠状动脉（MCA）收缩期受压程度与心肌桥（MB）长度和深度的相关性。
于舒张期测量 MB 的长度和深度。所有数据集均在 R-R 间隔的 5%步长进行重建。选择显示最大和最小直径的最佳相位。计算 MCA 收缩期受压程度。通过 Pearson 检验分析 MB 的长度和深度与 MCA 收缩期受压程度的相关性。
在 30%至 35%R-R 间隔的 27 个部位（90.0%）发现最小直径，在 70%至 80%R-R 间隔的 27 个部位（90.0%）发现最大直径。MCA 收缩期受压与 MB 长度之间无显著相关性（r=0.096，P=.613）；然而，MCA 收缩期受压与 MB 深度之间存在显著相关性（r=0.675，P<.01）。
MCA 的最小和最大直径通常分别在 30-35%和 70-80%R-R 重建间隔显示。MCA 收缩期受压程度与 MB 深度密切相关。
