Multi-row Spiral Ct Coronary Angiography Applied Research, Diagnosis Of Coronary Heart Disease

Objective: The purpose was to determine the feasibility and accuracy of multi-slice helical CT for detecting proximal coronary stenosis in patients(MSCTCA) with coronary artery disease (CAD). At the same time the reason of dismatching for the results of MSCT and selective coronary angiography was analyzed. The coronary artery segments with stent replacement were studied to detect the value of MSCT coronary angiography for coronary artery stents in patients with CAD .Methods:Plain and enhanced imaging were performed by retrospective ECG gating in 70 patients, including 60 cases suspected coronary artery disease, 10 cases of coronary stent. The VR,MIP,CPR,MPR and VE were used to reconstruct coronary artery. The results were compared with SCA. These main segments( vessel diameter≥2mm) in CTA were compared with SCA, and≥50% reduction of vessel diameter was defined as significant disease.Results: In the 639 coronary artery segments of 60 patients,573 were judged to be evaluable by CT(89.7%), These values corresponded to a sensitivity of 87.3%, specificity of 95.6%,positive predictive value of 83.7% ,and negative predictive value of 96.7% for the detection of significant coronary artery segments stenoses by CT. Of 15 stents, 12 were patent, of which MSCT coronary angiography and SCA showed accordance in 11 stents.Conclusion: multislice spiral CT with retrospectively ECG gating permits the visualization of significant coronary artery stenoses with high accuracy if image quality is sufficient.