The Clinical Values Of 64-slice Spiral Computed Tomography Angiography To Coronary Artery Stenosis

Objective: The aim of this study is to evaluate the diagnostic values for 64-slice computed tomography angiography (64 SCTCA) in coronary artery disease (CAD) patients. Comparing with coronary artery angiography, coronary artery stenosis is analyzed by 64 SCTCA.Methods: 32 patients clinically diagnosed with CAD were evaluated by 64 SCTCA and coronary artery angiography (CAG) was performed within two weeks after the 64 SCTCA examination. The data of 64 SCTCA and CAG were analyzed comparatively.Results: A total of 393 coronary artery sections in 32 patients by 64-slice spiral CT were evaluated and the comparative sections of coronary artery stenosis were analyzed by CAG. Compared with CAG, the results of 64-slice spiral CT showed the sensitivity, specificity, positive predictive value, negative predictive value for diagnosing CAD were 81.0%, 99.1%, 94.4%, 96.5% and 96.1% respectively. The sensitivity, specificity, positive predictive value, negative predictive value and compliance rate for diagnosing≥75% coronary artery stenosis were 72.2%,99.7%, 96.3%, 97.3% and 97.2% respectively.Conclusions:1. The 64-slice spiral CT coronary angiography can obtain the better image quality and the heart rate should be controlled in 50-70 beat/minuets.2. The 64-slice spiral CT coronary angiography for diagnosing coronary heart disease has a negative predictive value and can be used to excluding coronary artery disease.3. The 64-slice spiral CT coronary angiography could diagnose coronary artery stenosis as slight, morderate and severe stenosis lesions comparing with coronary artery angiography.4. The 64-slice spiral CT coronary angiography has a higher sensitivity and specificity in coronary heart disease patients with severe coronary artery stenosis lesions. It indicates that percutaneous coronary intervention should be considered for those patients.