Comparison Of Dual-source CT Coronary CTA And Selective Coronary Aniography In The Detection Of Coronary Artery Stenosis

Purpose. To determine the clinic value of Dual-source CT selective coronary angiography (CTA) in the detection of coronary artery stenosis compared to coronary angiography (CAG), the golden standard test.Materials and methods. Thirty patients with suspected Coronary heart disease (CHD) in the ward of The First Affiliated Hospital of Medical School of Zhejiang University underwent both Dual-source CT coronary angiography (CTA) and selective coronary angiography (CAG).The results of CAG was performed as a reference standard.Results.412 segments of the coronary arteries of 30 patients were taken to the study. 118 stenotic segments were found both by CTA and CAG,17 were found by CAG only, 9 were found by CTA only, and 268 were showed stenosis by neither CTA nor CAG. The diagnostic sensitivity of dual-source CTA was 87.4%, and the more serious the stenosis was, the higher the sensitivity was. The specificity was 96.8%. The total positive predictive value was 92.9%, and the more serious the stenosis was, the higher the positive predictive value was. The negative predictive value was 94.0%. The accuracy was 93.7%. The diagnostic sensitivity(92.9%), specificity(100%), positive predictive value(100%) and negative predictive value(96.3%) of the left main coronary artery and the left anterior descending branch are the highest during all three main branches of the coronary artery. The diagnostic sensitivity(75%) and the positive predictive value(78.3%) of the left circumflex, are the lowest during all the branches, and differ significantly.Conclusion. Dual-source CT coronary angiography has a high level of diagnosticsensitivity, specificity, positive predictive value, negative predictive value in the detection of coronary heart disease. The diagnostic value of dual-source CT is close to that of coronary angiography.