Table 1.
Frequency of anomalous coronary in overall cohort stratified by presence and location of obstructive CAD
| Anomalous coronary | All (N = 793) |
Absent CAD (N = 321) |
Only anomalous coronary with CAD (N = 142) |
Normal-origin coronary with CAD (N = 330) |
|---|---|---|---|---|
| n (%) | n (%) | n (%) | n (%) | |
| LMCA | 108 (14) | 61 (19) | 20 (14) | 27 (8.2) |
| LAD | 27 (3.4) | 9 (2.8) | 2 (1.4) | 16 (4.8) |
| LCx | 343 (43) | 57 (18) | 77 (54) | 209 (63) |
| RCA | 306 (39) | 188 (59) | 41 (29) | 77 (23) |
| Multiple | 9 (1.1) | 6 (1.9) | 2 (1.7) | 1 (0.3) |
The presence of obstructive coronary artery disease (CAD) was defined as obstructive lesions with >50% stenosis in the left main coronary artery (LMCA) or >70% stenosis in the right coronary artery (RCA), left anterior descending (LAD), or left circumflex (LCx) coronary artery. The frequencies of patients with AAOCA affecting each of the 4 or multiple coronaries were stratified based on the presence and location of any CAD. Patients with obstructive CAD only in the anomalous coronary were compared with those without any CAD and those with CAD in normal-origin vessels. The results of a χ2 test found a difference in the presence and location of CAD among AAOCA based on which coronary was anomalous (P < .0001). AAOCA, Anomalous aortic origin of a coronary artery.