Table 4.
Characteristics of studies assessing non-invasive imaging of coronary artery bypass grafts.
| Achenbach et al | Engleman et al | Engleman et al | Ropers et al | Ko et al | Marano et al | Schlosser et al | Martuscelli et al | Moore et al | Chiurlia et al | Houslay et al | Pooled data | |
| Year of publication | 1997 | 1997 | 2000 | 2001 | 2003 | 2004 | 2004 | 2004 | 2005 | 2005 | 2005 | |
| Method | Electron beam CT | Spiral CT | Spiral CT | Spiral CT | 4 slice CT | 4 slice CT | 16 slice CT | 16 slice CT | 4 slice CT | 16 slice CT | 16 slice CT | |
| No. of patients | 25 | 49 | 24 | 65 | 39 | 57 | 51 | 96 | 50 | 52 | 50 | |
| Mean age | 64 | 61 | 61 | 67 | 60 | 65 | 65 | 62 | 69 | 63 | 66 | |
| Sex (% male) | 92 | 92 | 92 | 82 | 74 | 95 | 76 | 83% | 76 | 87 | 86 | |
| No. grafts | 54 | 134 | 78 | 182 | 115 | 122 | 131 | 251 | 150 | 165 | 116 | 1498 |
| IMA | 1 | 42 | 20 | 20 | 40 | 95 | 40 | 85 | 38 | 46 | 35 | 462 |
| SVG | 53 | 92 | 58 | 162 | 54 | 27 | 91 | 166 | 112 | 117 | 77 | 1009 |
| other | 21 | 2 | 4 | 27 | ||||||||
| % vein grafts | 98% | 69% | 74% | 89% | 47% | 22% | 69% | 66% | 66% | 70% | 66% | |
| Mean graft age (yrs) | 6.9 | 1.8 | 2.1 | 7.6 | 1.2 | 4.8 | 5.6 | 7 | 8 | 7.9 | 7.0 | |
| Sensitivity | 100% | 92% | 90.1% | 97% | 93% | 93% | 96% | 100% | 91% | 100% | 93% | 96% |
| Specificity | 100% | 97% | 100% | 98% | 99% | 98% | 95% | 100% | 100% | 100% | 100% | 99% |
| PPV | 100% | 99% | 100% | 97% | 93% | 93% | 81% | 100% | 100% | 100% | 100% | 99% |
| NPV | 100% | 78% | 74% | 98% | 99% | 98% | 99% | 100% | 96% | 100% | 85% | 95% |
| Accuracy | 100% | 93% | 92% | 98% | 98% | 97% | 95% | 100% | 97% | 100% | 95% | 97% |
IMA: internal mammary artery; SVG: saphenous vein graft; PPV: positive predictive value; NPV: negative predictive value.