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目的分析64排螺旋CT血管造影(CTA)冠状动脉(简称冠脉)正常者的左心室心肌强化程度,为应用CTA判断冠脉狭窄患者左心室心肌缺血(心肌强化程度减低)提供参考。方法选取我院近2年行64排螺旋CT心脏冠脉成像中冠脉正常者161例为观察对象,观察其室间隔中部、左心室前壁中部、底壁中部、心尖部4个感兴趣区(ROI)测量其平扫及增强时的心肌密度(CT值),分析其左心室心肌强化情况。结果 161例观察对象的各ROI强化值有一定差别,由高到底依次为左心室底壁、室间隔中部、左心室前壁、左心室尖部;各ROI左心室心肌强化值女性高于男性(均P<0.01)。结论64排螺旋CT心脏冠脉成像中冠脉正常者的左心室心肌强化程度的初步参考范围为(55.15±9.65)~(67.28±8.36)Hu,可为进一步应用CTA判断冠心病患者左心室心肌缺血情况提供参考。
Objective To analyze the extent of left ventricular myocardial enhancement in patients with normal coronary artery (CTA) with 64-slice spiral CT angiography (CTA), and to provide a reference for the determination of left ventricular myocardial ischemia (decreased myocardial enhancement) in patients with coronary artery stenosis by CTA. Methods Sixty-six patients with normal coronary arteries in 64-slice spiral CT coronary angiography were selected as the observation objects in our hospital in the recent 2 years. Four middle-ventricular septum, middle ventricular anterior wall, middle ventricular wall, apical four regions of interest (ROI) were measured during plain scan and enhanced myocardial density (CT value), analysis of left ventricular myocardial enhancement. Results There were some differences in intensified values of ROI among the 161 subjects, from left to right in the end, followed by the left ventricular wall, the middle of the septum, the anterior wall of the left ventricle, and the apex of the left ventricle. All P <0.01). Conclusion The preliminary reference range of left ventricular myocardial enhancement in 64-slice spiral CT coronary angiography is (55.15 ± 9.65) ~ (67.28 ± 8.36) Hu, which can be used to further determine the left ventricular myocardium in patients with coronary heart disease Provide a reference for the situation of ischemia.