- Abnormal origin
- Absent left main stem (dual LCX and LAD origin)
- High origin
- Origin from an improper sinus
- RCA from left anterior sinus
- LAD from right anterior sinus
- LCX from right anterior sinus
- Left mainstem from right anterior sinus
- Single coronary artery
- Origin from other structure
- Anomalous left coronary artery from the pulmonary artery (ALCAPA)
- Congenital absence or aneurysm
- Stenosis, atresia, hypoplasia
- Ectasia or aneurysm
- Abnormal number
- Absent coronary artery
- Duplicated coronary artery
- Abnormal termination
- Fistula with cardiac chamber, pulmonary artery, pulmonary vein, systemic circulation