Diagnostic value of CT angiography for coronary artery stenosis caused by calcified plaque of coronary artery

Abstract

Objective To investigate the diagnostic value of computed tomography angiography(CTA) in coronary artery stenosis caused by calcified plaque of coronary artery. Methods A total of 103 patients with coronary heart disease admitted to Gansu Provincial People’sHospital from March 2015 to October 2018 were selected as the subjects. All the patients underwent CTA examination. Coronary angiography (CAG) was performed within 7 days after CTA. The detection of calcified and mixed plaques in coronary artery was recorded by different methods. The evaluation results of CTA and CAG on the stenosis degree caused by the above plaques were analyzed statistically. Results All the 103 patients with coronary heart disease successfully completed CTA and CAG examinations. A total of 432 stenosis coronary arteries were found by CAG. The sensitivity of CTA to coronary aronary artery stenosis were 96.99% and the spectficity was 100.00%. There was no significant difference between CTA and CAG in judging the degree of coronary artery stenosis caused by mixed plaque (P>0.05). CTA showed better efficacy in determining the degree of coronary artery stenosis caused by calcified plaque (P>0.05). Conclusions The detection rate of coronary artery stenosis by CTA is high, but the accuracy of diagnosis of coronary artery stenosis caused by calcified plaque is not ideal. Therefore, other methods should be used or combined to determine the degree of coronary artery stenosis. Key words: Coronary artery calcified plaque; Coronary artery Stenosis; Computed tomography angiography