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Table 1 Classification of anomalous coronary arteries (n=173)

From: Prognosis of anomalous coronary arteries originating from the opposite sinus of Valsalva (ACAOS): 15 year experience from two large CMR centres

Classification Number
1. Origin of both RCA and LMS (separate origins) from the right aortic sinus
- 1a. Course of anomalous LMS between aorta and RVOT (anterior) 13
- 1b. Course of anomalous LMS not between aorta and RVOT (posterior) 8
2. Origin of both coronary arteries (separate origins) from the left aortic sinus
- 2a. Course of anomalous RCA between aorta and RVOT (anterior) 34
- 2b. Course of anomalous RCA not between aorta and RVOT (posterior 0
3. Anomalous origin of the circumflex coronary artery from the right aortic sinus
- 3a. Course of anomalous LCx between aorta and RVOT (anterior) 1
- 3b. Course of anomalous LCx not between aorta and RVOT (posterior) 33
4. Anomalous origin of the left anterior descending artery from the right aortic sinus
- 4a. Course of anomalous LAD between aorta and RVOT (anterior) 4
- 4b. Course of anomalous LAD not between aorta and RVOT (posterior) 6
5. Single coronary artery (common origin)
- 5a. Course of anomalous coronary artery between aorta and RVOT (anterior) 13
- 5b. Course of anomalous coronary artery not between aorta and RVOT (posterior) 5
6. Anomalous origin or communication of a coronary artery with a cardiac chamber or major thoracic vessel
- 6a. Abnormal origin from the pulmonary artery or one of its major arterial branches 11
- 6b. Abnormal origin from the aorta or one of its major arterial branches 2
- 6c. Abnormal communication of a coronary artery with a cardiac chamber or major thoracic vessel (fistula). 18
7. Miscellaneous / unclassified 25