situs inversus situs inversus with levocardia situs inversus of thoracic and abdominal viscera with the heart remaining normally situated on the left; usually associated with congenital cardiac abnormalities such as transposition of the great vessels and/or spleen defects including asplenia or polysplenia The term "levocardia" can also be used to indicate the absence of dextrocardia, and thus normal positioning of the heart, part of situs solitus, normal positioning of the organs. However, this usage is less frequent. Fyler:102 MPheno.ontology Fyler:0102 MPATH:714 levocardia csmith MP:0011253 2011-09-09T11:36:01Z