Position, Morphology and Calcification of Coronary Plaque would Influence the Consistency between 320-row DVCT and CAG

Objective: The judgment of coronary stenosis by 320-row dynamic volume CT (DVCT) and coronary angiography (CAG) is not entirely consistent. We compared them in this study.

Methods: We studied 92 patients (265 lesions) with CAG and DVCT. According to the degree of matching in stenosis judgment, all lesions were divided into consistent group and inconsistent group. The position of lesions, the degree of bending, plaque morphology, and calcification proportion were analyzed.

Results: There were 236 lesions in consistent group and 29 lesions in inconsistent group. In inconsistent group, there were more LCX lesions, distal lesions, ostial lesions and tortuous lesions than those in consistent group (P < 0.05). At the same time, the proportion of nubbly type plaque, mixed plaque, nubbly and nodular type calcification in the main plaque in inconsistent group were higher than those in consistent group (P < 0.05). The lesions in inconsistent group showed higher calcification load, such as higher segmental coronary calcium score, more calcification points and higher calcification proportion than those in consistent group (P < 0.05).

Conclusion: When coronary lesion is in ostial, distal or tortuous position, and when the main plaque is nubbly type or with heavy calcification load, the judgment of stenosis by DVCT and CAG is more apt to inconsistent.