In isolated situs inversus (occurring alone with no other abnormalities), there is a complete mirror image transposition of the thoracic (chest) and abdominal organs , and anterior-posterior (front-back) symmetry is normal. Many affected people have no associated health issues when the condition is isolated.
What is situs inversus totalis?
Disease definition. A rare, genetic, developmental defect during embryogenesis characterized by total mirror-image transposition of both thoracic and abdominal viscera across the left-right axis of the body.
Is situs inversus totalis rare?
Situs inversus is a very rare condition. According to an article in the journal Heart Views , it occurs in an estimated 1 in 10,000 people.
How rare is situs inversus totalis?
Situs inversus is found in about 0.01% of the population, or about 1 person in 10,000. In the most common situation, situs inversus totalis, it involves complete transposition (right to left reversal) of all of the viscera.
What’s it called when your heart is on the wrong side?
Dextrocardia is a heart condition that makes the heart move out of its usual position. It points towards the right side of your chest instead of the left side.
What is situs inversus with levocardia?
Situs inversus has two main subtypes: dextrocardia and levocardia. A person is said to have dextrocardia if the point of the heart is on the right side. A person is said to have levocardia if the heart is on the left side, yet the other organs are flipped.
What is visceral situs?
Visceral situs refers to the pattern of arrangement of the body organs relative to the midline. There are four types of visceral situs: situs solitus, situs inversus, heterotaxy with thoracic right isomerism, and heterotaxy with thoracic left isomerism (Fig. 7.1).
How does situs inversus start?
Situs inversus is caused by an autosomal recessive genetic condition . An unaffected carrier mother and an unaffected carrier father have a 1 in 4 chance of having a child with situs inversus. Because many genetic steps would have to come together to cause situs inversus, the condition is rare. The condition is also seen in “mirror image” twins.
How is situs inversus treated?
No treatment is indicated for situs inversus unless the patient has congenital heart disease and associated complications, in which the specific therapy will depend on the cardiac anomaly and the clinical picture.
How common is situs inversus?
Situs inversus is a very rare condition. According to an article in the journal , it occurs in an estimated 1 in 10,000 people.
What does situs inversus mean?
Situs inversus is a genetic condition in which the organs in the chest and abdomen are positioned in a mirror image from their normal positions. For example, the left atrium of the heart and the left lung are positioned on the body’s right side.
