What does situs solitus mean and why is it important?

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What does situs solitus mean and why is it important?

Situs solitus means the normal arrangement of the heart and visceral organs as they typically appear in the fetus. The heart is on the left with the apex pointing left, and the stomach is on the left while the liver sits on the right, with the other organs following their standard positions. This baseline is important in fetal echocardiography because many congenital heart diseases are associated with abnormal body situs. If the situs pattern is not solitus—such as a mirror-image arrangement (situs inversus) or a disordered arrangement (heterotaxy)—the risk of complex CHD increases and planning for delivery, imaging, and postnatal care or surgery can be significantly affected. So, recognizing situs solitus helps establish normal anatomy and flags when additional evaluation and planning are needed.

Situs solitus means the normal arrangement of the heart and visceral organs as they typically appear in the fetus. The heart is on the left with the apex pointing left, and the stomach is on the left while the liver sits on the right, with the other organs following their standard positions. This baseline is important in fetal echocardiography because many congenital heart diseases are associated with abnormal body situs. If the situs pattern is not solitus—such as a mirror-image arrangement (situs inversus) or a disordered arrangement (heterotaxy)—the risk of complex CHD increases and planning for delivery, imaging, and postnatal care or surgery can be significantly affected. So, recognizing situs solitus helps establish normal anatomy and flags when additional evaluation and planning are needed.

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