The Clinical Value of Dual Source Computed Tomography Angiography and Coronary Angiography in Coronary Heart Disease Diagnosis

Objective To evaluate the clinical value of 64-slice dual source computed tomography angiography(DSCT)in diagnosis of coronary heart disease.Methods DSCT angiography was performed on 50 patients with suspected or proven coronary heart diseases and coronary angiography(CAG)was performed in these patients within 4 weeks.We analyzed their 578 segments of 200 coronary artery bunches.The CAG results were served as gold standardto evaluate the diagnostic accuracy of DSCT in coronary artery significant stenosis(diameter reduction≥50%).Results The sensitivity,specificity,positive predictive value,negative predictive value and agreement rate of DSCT were 79.7%、96.9%、87.5%、94.6% and 93.3% in per-segment analysis. In per-artery analysis,the sensitivity,specificity,positive predictive value,negative predictive value and agreement rate of DSCT were 85.6%、90.9%、88.5%、88.5% and 88.5%.The rate of coronary heart disease identified by DSCT was 97.7%.There was no statistical difference in the diagnosis of coronary artery stenosis between DSCT and CAG(P0.05).Conclusion 64-slice DSCT is a noninvasive method for diagnosing the coronary artery stenosis which provided a high diagnostic accuracy.