01 September 2021
: Case report 
A Coronary Artery Anomaly Presenting as Acute Coronary Syndrome: A Case Report
Challenging differential diagnosis, Congenital defects / diseases
Mariana S. de A. Chaud1ABCDEF, Camila A. Agostinho1AB, Felipe L. Malafaia1ACDE, Márcio C. Sampaio1BD, Paulo Chaccur1ABC, Pedro Gabriel Melo de Barros e Silva
1CE, Expedito E. Ribeiro1AB, José Carlos Teixeira Garcia1CD, Valter Furlan1CD, Henrique B. Ribeiro1ABCDEF*
DOI: 10.12659/AJCR.931561
Am J Case Rep 2021; 22:e931561
Table 1. Classification scheme of coronary artery anomalies*.
| I. Hemodynamically significant anomalies |
| A. Atresia of a coronary artery |
| B. Origin of a coronary from the pulmonary artery |
| C. Interarterial course (between the aorta and pulmonary artery) |
| D. Congenital fistula |
| II. Nonhemodynamically significant anomalies |
| A. Duplication of a coronary artery |
| B. High coronary artery origin (more than 1 cm above the sinotubular junction) |
| C. Prepulmonic course (anterior to the pulmonary artery) |
| D. Transseptal course (or intramyocardial artery, passing through the septal myocardium) |
| E. Retroaortic course (posterior to the aortic root) |
| F. Shepherd’s crook RCA (tortuous and high course of RCA) |
| G. Systemic arterial termination of a coronary artery |
| RCA – right coronary artery. * Adapted from Shriki JE et al. []. |