Abnormal position of the heart,
with location of left atrium on right side and vice versa (i.e. situs
inversus), is classified according to the position of the left atrium, the main
bronchi, and the abdominal organs. Inversion of viscera (abdominal situs
inversus) is always associated with atrial inver-sion. Major malformations of
heart structures are usually found in either of the following:
+ normal position of abdominal organs.
position of heart (laevocardia) + abdominal situs inversus.
Characteristic heart malformations
include—pulmonary stenosis; tricuspid atresia; transposition of the great
arteries; anomalous pulmonary venous drainage; atrioventricular septal defects;
No malformations of the heart
structures are found when dextrocardia and abdominal situs inversus (i.e.
mirror-image dextrocardia) are present in combination.