Early post operative assessment of CABG by multi-detector row computed tomography and correlation between calcium score and early graft occlusion after coronary bypass surgery

Objectives : The objective of our study was to assess early post operative patency and anatomy of CABGs using retrospectively ECG gated MDCT and correlation between the amount of calcium scoring and early coronary graft occlusion and also retrospective correlation between Calcium scoring and coronary artery disease . Material Method : 65 patients(43 men , 12 women) who underwent CABG in Shahid Rajaii heart hospital were included in this study.The time interval between the CABG surgery and imaging protocol was less than l month.We used ECG gated 10 detector CTA( slice thickness 0.6 mm ,rotation 500ms) , for detection the relation between coronary calcium score and early SVG graft occlusion. The threshold of 130 Hounsfield units was set to identify calcifications by Agatston method. Results and Conclusion : The sensitivity and the specificity of calcification for severe stenosis ( 75%) were 85% and 40%, respectively. we did not find any correlation between coronary calcium scoring and early SVG graft occlusion(pv=0.6).