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Ligamentum arteriosum

Dr Yuranga Weerakkody ◉ and Dr Craig Hacking ◉ ◈ et al.

The ligamentum arteriosum (or arteriosus) is the small fibrous remnant of the fetal ductus arteriosum, located between and connecting the proximal left pulmonary artery and the undersurface of the junction of the aortic arch and descending aorta, at the aortic isthmus. The left recurrent laryngeal nerve curves upwards from the left vagus nerve underneath the aortic arch lateral then posterior to the ligamentum arteriosum as it ascends to the larynx. It is one of the many structures at the level of the horizontal transthoracic plane of Ludwig.

The ligamentum may create a small diverticulum arising from the anteromedial wall of the aorta, known as a ductus diverticulum, that may be mistaken for a aneurysm.

In some individuals this may be calcified (see ligamantum arteriosum calcification)

Related pathology

References

Anatomy: Thoracic

thoracic skeleton
- thoracic cage
  - ribs
    - typical ribs
    - atypical ribs
    - variant anatomy
      - bifid ribs
      - Srb anomaly
  - costal cartilage
  - sternum
- thoracic spine
- articulations
muscles of the thorax
spaces of the thorax
thoracic viscera
blood supply of the thorax
- arteries
  - thoracic aorta (development)
  - pulmonary trunk
    - left pulmonary artery
      - aberrant left pulmonary artery
    - right pulmonary artery
- veins
  - superior vena cava (cavoatrial junction)
  - inferior vena cava
  - coronary veins
    - cardiac veins which drain into the coronary sinus
      - great cardiac vein
      - middle cardiac vein
      - small cardiac vein
      - posterior vein of the left ventricle
      - vein of Marshall (oblique vein of the left atrium)
    - anterior cardiac veins
    - venae cordis minimae (smallest cardiac veins or thebesian veins)
  - pulmonary veins
    - bronchial veins
lymphatics
innervation of the thorax

Article information

rID: 49312

System: Vascular, Chest

Section: Anatomy

Synonyms or Alternate Spellings:

ligamentum arteriosus

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