An anomalous right coronary artery is one cause of inferior myocardial infarction, according to the National Center for Biotechnology Information. Other causes include a blockage of the coronary artery, a tear in the heart artery and spasm of the coronary artery, as explained by Mayo Clinic.
Anomalous coronary arteries can result in poor coronary circulation that may lead to angina, syncope or sudden cardiac death. Coronary artery spasm can be caused by use of tobacco and cocaine, according to Mayo Clinic. The disease is common among people younger than 30, especially athletes, although clinical symptoms occasionally occur in people older than 30 years of age, as highlighted by the National Center for Biotechnology Information.