Value of 64-slice spiral CT coronary angiography in assessment of coronary artery stenosis

AIM: To compare the accuracy and limitations of 64-slice CT(MSCT) coronary angiography with invasive coronary angiography in the detection of significant coronary stenosis(≥50% lumen diameter narrowing).METHODS: Data were from 30 subjects [21 males,9 females,mean age(62±7) years,range: 49-74 years] who had undergone MSCT and invasive coronary angiography within 2 weeks.Two experienced cardiologists analyzed the images of MSCT and invasive coronary angiography.RESULTS: For accuracy of coronary MSCT by each lesion segment,the average sensitivity was 50% and the average specificity 97%.Excluding the effect of 38 coronary segments with severe calcification,sensitivity and the specificity of MSCT were 74% and 99%,respectively.CONCLUSION: MSCT coronary angiography has a high accuracy rate and good potential for detection of coronary stenosis.However,severe calcification affects the accuracy in the detection of stenosis.