congenital heart malformation ectasia of the left appendage https://github.com/monarch-initiative/mondo/issues/6740 https://github.com/monarch-initiative/mondo/issues/6876 https://www.malacards.org/card/ectasia_of_the_left_atrial_appendage dilatation of the left appendage ectasia of the left auricle MEDGEN:1656788 dilatation of the left auricle GARD:0019650 Ectasia of the left atrial appendage is a rare cardiac malformation characterized by the enlargement of the left auricle without any other associated cardiac lesions. It can be asymptomatic (discovered fortuitously during routine chest imaging as an unusual cardiac shadow) or present clinically with supraventricular tachyarrhythmia, paroxysmal tachycardia, embolic events, respiratory distress, chest pain, angina pectoris or heart failure. UMLS:C4749282 MONDO:0020433 dilatation of the left atrial appendage Orphanet:99102