Dextrocardia
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Dextrocardia is a peculiar condition in which the heart is positioned on the right side of the chest while it is normally on the left (mirror-image). The name is derived from dexter in Latin meaning "on the right" and cardio meaning "of the heart".
If the rest of the organ systems are reversed, the condition is called situs inversus. Individuals with both dextrocardia and situs inversus (in which all the organs are flipped, leaving the heart in its normal place relative to the rest of the viscera) suffer a far lesser rate of congenital heart defects than do people with only one of the two conditions.
Reference
- Dextrocardia (http://www.meddean.luc.edu/lumen/MedEd/GrossAnatomy/thorax0/Heart_Development/Dextrocardia.html)