coronary artery congenital malformation intramural coronary arterial course https://github.com/monarch-initiative/mondo/issues/6740 https://github.com/monarch-initiative/mondo/issues/6876 MEDGEN:576769 UMLS:C0345123 Orphanet:99088 GARD:0025164 Intramural coronary arterial course is a rare coronary artery congenital malformation disorder characterized by an atypical course of a coronary artery (usually proximal left anterior descending artery) in which, for a variable length, the artery runs intramyocardally. Depending on the artery and length of segment involved, patients may be asymptomatic or may present variable manifestations ranging from atypical angina to sudden death. MONDO:0020424