Ligamentum arteriosum

Ligamentum arteriosum is a small ligament that is the remnant of a fetal vessel known as the ductus arteriosus. It is located in the heart, connecting the aorta and the left pulmonary artery.

Etymology[edit | edit source]

The term "ligamentum arteriosum" is derived from Latin, where "ligamentum" means "band" or "tie", and "arteriosum" refers to its arterial origin.

The ligamentum arteriosum is a small, fibrous band that extends from the upper surface of the left branch of the pulmonary artery to the beginning of the descending aorta. It is typically about 1.25 cm in length and is covered by a layer of pleura.

Development[edit | edit source]

During fetal development, the ductus arteriosus is a vital structure that allows blood to bypass the lungs, which are not yet functional. After birth, as the lungs begin to function, the ductus arteriosus constricts and eventually becomes the ligamentum arteriosum.

Clinical significance[edit | edit source]

In some cases, the ductus arteriosus fails to close after birth, a condition known as patent ductus arteriosus (PDA). This can lead to a number of health problems, including heart failure and poor growth. Treatment for PDA may include medication or surgery.

Related terms[edit | edit source]

Ligamentum arteriosum Resources
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