Follow-up of Coronary Artery Bypass Graft Patency by Multislice Computed Tomography

Transitioning from 16-slice to 64-slice multidetector computed tomography for the assessment of coronary artery disease: Are we really making progress?

“…The 64-slice MDCT had an NPV of 100%, a PPV of 98%, an undefined positive likelihood ratio and a negative likelihood ratio of 0.0 (Table 4). Consistent with the results for nonrevascularized coronary arteries, 64-slice MDCT was able to assess more bypass grafts and was more accurate than 16-slice MDCT (64)(65)(66)(67)(68)(69).…”

Diagnostic accuracy of 64-slice multidetector computed tomography in evaluation of post-coronary artery bypass grafts in correlation with invasive coronary angiography

“…7 In our study, the overall scan time varied from 8 seconds to 12 seconds, significantly decreased as compared to the previous 4-slice (40 seconds) and 16-slice (30 seconds) scanners. [8][9][10] In our study, because of increased scan speed and volume coverage, in all patients we could cover the origin of LIMA grafts in spite of maintaining the breath hold within reasonable limits.…”

Computed Tomography of the Coronary Arteries

“…The detection of graft-occlusion using the 16-slice CT-scanner is quite reliable (Table 7) while the detection of non-occlusive stenoses is more problematic (47)(48)(49)(50)(51)(52)(53) . The 64-slice scanners perform slightly better, but evaluation of a post-bypass patient should include not only the bypass grafts but also the run-off native coronary segments distal to the graft anastomosis and non-grafted native coronary segments ( Figure 6).…”