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采用心电门控64层螺旋CT技术评估正常左心室局部收缩功能,确立功能参数的参考值。对42例正常心脏进行扫描,重建心动周期十个时相左心室短轴位,用心功能软件勾画心内外膜边界,计算和分析左心室局部收缩功能。收缩末期室壁厚度(End-systolic thickness,EST)较舒张末期室壁厚度(End-diastolic thickness,EDT)厚(P<0.05)。从心尖部、中部至基底部,室壁厚度依次增加,而增厚率依次递减,中部与基底部比较有显著性差异(P<0.05)。同一肌部内、前、侧、下壁肌段的室壁厚度、室壁运动和增厚率高于间隔肌段(P<0.05)。64层螺旋CT能准确地测量左心室局部收缩功能。正常左心室局部收缩功能参数可为临床提供心功能异常判定的参考值。
Using ECG-gated 64-slice spiral CT technique to assess normal left ventricular regional systolic function, establish the reference value of functional parameters. 42 cases of normal heart were scanned, the left ventricular short axis was reconstructed at ten phases of cardiac cycle, the boundaries of the heart and adventitia were outlined by cardiac function software, and the local systolic function of left ventricle was calculated and analyzed. End-systolic thickness (EST) was thicker than end-diastolic thickness (EDT) (P <0.05). From the apex, the middle to the basal part, the thickness of the ventricular wall increased in turn, while the thickening rate decreased in turn, the central and basal parts were significantly different (P <0.05). The thickness, wall motion and thickening of the medial, anterior, lateral and inferior muscularis segments in the same muscular segment were higher than those in the segmental muscle segment (P <0.05). 64-slice spiral CT can accurately measure left ventricular regional systolic function. Normal left ventricular regional systolic function parameters for the clinical assessment of cardiac dysfunction to provide a reference value.