Table 3.
Hybrid-based reclassification of myocardial perfusion abnormalities
| Standard coronary distribution | Myocardial segments (17 segments LV model)a | Perfusion abnormality, n | Abnormal segment reclassified, n (%) | To LAD, n (%) | To LCX, n (%) | To RCA, n (%) |
|---|---|---|---|---|---|---|
| LAD | Segment 1 | 50 | 0 (0) | – | 0 (0) | 0 (0) |
| Segment 2 | 51 | 1 (2) | – | 0 (0) | 1 (100) | |
| Segment 7 | 56 | 0 (0) | – | 0 (0) | 0 (0) | |
| Segment 8 | 48 | 0 (0) | – | 0 (0) | 0 (0) | |
| Segment 13 | 62 | 0 (0) | – | 0 (0) | 0 (0) | |
| Segment 14 | 51 | 1 (2) | – | 0 (0) | 1 (100) | |
| Segment 17 | 79 | 6 (8) | – | 2 (33) | 4 (67) | |
| LCX | Segment 5 | 72 | 25 (35) | 0 (0) | – | 25 (100) |
| Segment 6 | 43 | 20 (47) | 19 (95) | – | 1 (5) | |
| Segment 11 | 58 | 20 (34) | 17 (85) | – | 3 (15) | |
| Segment 12 | 44 | 31 (70) | 30 (97) | – | 1 (3) | |
| Segment 16 | 52 | 35 (67) | 30 (86) | – | 5 (14) | |
| RCA | Segment 3 | 55 | 13 (24) | 10 (77) | 3 (23) | – |
| Segment 4 | 82 | 15 (18) | 0 (0) | 15 (100) | – | |
| Segment 9 | 52 | 15 (29) | 12 (80) | 3 (20) | – | |
| Segment 10 | 76 | 15 (20) | 0 (0) | 15 (100) | – | |
| Segment 15 | 73 | 49 (67) | 42 (86) | 7 (14) | – |
LV, left ventricle; LAD, left anterior descending artery; LCX, left circumflex artery; RCA, right coronary artery.
aFor exact location of perfusion segment within the LV see Figure 2A.