Objective To evaluate the clinical diagnostic value of coronary artery calcification score(CACS)of multi-slice spiral computed tomography(MSCT)combined with carotid intima-media thickness(IMT)measure in elderly patients with coronary artery disease(CAD). Methods CACS of MSCT,carotid IMT measure,and coronary angiography were performed in 68 patients,including 36 cases with CAD(CAD group)diagnosed by coronary angiography and 32 cases(control group)with coronary arterial stenosis(＜50% stenosis).CACS and carotid IMT were compared between two groups. Results The coronary artery calcification score was significantly increased in CAD group compared with the control group[(349.5±86.3)vs.(74.7±25.2),t=13.670,P＜0.01],and it was increased with the severity of coronary arterial stenosis.The carotid intima-media thickness in CAD group showed significant difference with that in control group[(1.11±0.05)mm vs(0.69±0.13)mm,t=13.587,P＜0.01].In CAD group,CACS exhibited a significant positive correlation with carotid IMT(r=0.950,P＜0.01).The positive rates of CACS and carotid IMT were both 77.8% (28 cases)in CAD group and both 12.5%(4 cases)in control group,which showed significant difference between two groups(X2=28.976,P＜0.01). Conclusions CACS of MSCT combined with carotid IMT have high sensitivity and specificity in evaluating coronary arteriaI stenosis.It can be used as a non-invasive examination to diagnose CAD in the elderly.%目的 探讨多层螺旋CT冠状动脉钙化积分(CACS)结合测量颈动脉内膜-中膜厚度(IMT)在老年人冠心病诊断中的价值. 方法 68例患者均行多层螺旋CT测定CACS、测量颈动脉IMT及冠状动脉造影检查,冠心病组36例患者行冠状动脉造影诊断为冠心病;非冠心病组32例,为冠状动脉造影证实冠状动脉狭窄＜50%者.比较冠心病组与非冠心病组CACS值及颈动脉IMT.结果冠心病组CACS较非冠心病组明显升高[分别为(349.5±86.3)分和(74.7±25.2)分,t=13.670,P＜0.01],且CACS值随冠状动脉狭窄程度加重而增加.冠心病组IMT与非冠心病组比较,差异有统计学意义[分别为(0.69±0.13)mm和(1.11±0.05)mm,t=13.587,P＜0.01].冠心病患者中,颈动脉IMT与CACS呈正相关(r=0.950,P＜0.01).36例冠心病患者中,CACS与IMT均阳性28例(77.8%);32例非冠心病患者中,CACS与IMT均阳性4例(12.5%),两者相比较差异有统计学意义(X2=28.976,P＜0.01). 结论 CACS与颈动脉IMT测定对预测冠心病有较高的敏感性和特异性,可作为无创性冠心病诊断方法 .
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