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Related Concept Videos

The Arch of Aorta01:10

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The coronary arteries, originating from the ascending aorta, bifurcate from two sinuses located within the ascending aorta. Positioned just above the aortic semilunar valve, these sinuses house essential aortic baroreceptors and chemoreceptors, crucial for maintaining cardiac function. The left coronary artery and the right coronary artery branch off from the left posterior and anterior aortic sinuses, respectively.
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The human body's intricate network of arteries ensures that every organ system receives the necessary oxygen and nutrients for optimal function. The arterial network in the head and neck region is particularly complex, providing vital blood flow to the brain, eyes, and other critical structures. Prominent arteries in this region include the internal carotid arteries and the vertebral arteries.
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Once the aorta traverses the diaphragmatic plane at the aortic hiatus, it is known as the abdominal aorta. This anatomical structure is positioned leftward of the spinal column, encased within a cocoon of adipose tissue behind the peritoneal cavity. It terminates at the L4 vertebra, where it splits into the common iliac arteries. Prior to this bifurcation, the abdominal aorta gives rise to several vital branches.
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Related Experiment Video

Updated: May 7, 2026

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Truncus bicaroticus: an underestimated anatomic variation.

Christoph Becker1, Zoltan Csatari, Jens Pfeiffer

  • 1Department of Otorhinolaryngology-Head and Neck Surgery (C.B., J.P.), University of Freiburg, Freiburg, Germany.

The Laryngoscope
|October 15, 2013
PubMed
Summary

Anatomical variations like truncus bicaroticus and elongated truncus brachiocephalicus are common. Preoperative ultrasounds are crucial before tracheostomy to prevent severe bleeding from these vessel anomalies.

Keywords:
Truncus bicaroticusaberrant carotid arteryneck surgerysupraaortic vessel anomaliestracheostomytruncus brachiocephalicus

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Area of Science:

  • Vascular anatomy
  • Surgical safety
  • Medical diagnostics

Background:

  • Anatomical variations in supraaortic vessels, such as truncus bicaroticus and elongated truncus brachiocephalicus, are often underestimated.
  • These anomalies pose significant risks during surgical interventions.

Observation:

  • A case report details a patient undergoing tracheostomy where a pulsatile vessel crossing the cricoid cartilage halted the procedure.
  • Further investigation revealed supraaortic vessel anomalies, including a truncus bicaroticus.

Findings:

  • Anomalies of the supraaortic vessels are not rare.
  • Injuries to these anomalous vessels can lead to severe, life-threatening hemorrhage.

Implications:

  • Routine preoperative ultrasound is recommended before procedures like dilatative tracheostomy.
  • Identifying these vascular variations can prevent surgical complications and improve patient outcomes.