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Related Concept Videos

The Aorta01:14

The Aorta

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The aorta is the largest artery in the human body. It originates from the left ventricle of the heart and extends down to the abdomen, where it splits into two smaller arteries. Structurally, it can be divided into four main parts: the ascending aorta, the aortic arch, the thoracic aorta, and the abdominal aorta.
The average diameter of the aorta is approximately 2-3 cm, but the size can vary depending on the section of the aorta and the individual's age, sex, and body size. The aorta is...
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Abdominal Aorta01:25

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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.
The celiac trunk, a singular artery, divides into the left gastric artery, which...
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Aneurysm II: Clinical Manifestations and Diagnostic Studies01:21

Aneurysm II: Clinical Manifestations and Diagnostic Studies

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Thoracic, aortic arch and abdominal aneurysms are significant vascular conditions that can present with various clinical manifestations and lead to serious complications. Understanding these manifestations and the appropriate diagnostic studies is essential for effective management and treatment.Thoracic Aortic AneurysmsThoracic aortic aneurysms often remain asymptomatic until they reach a size that impinges on adjacent structures. They typically cause deep, diffuse chest pain that radiates to...
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Aortic Regurgitation II: Clinical Features and Diagnostic Tests01:22

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Aortic valve regurgitation (AR) occurs when the aortic valve fails to close properly, allowing blood to flow backward from the aorta into the left ventricle. This backflow can result in two distinct clinical presentations: acute and chronic AR, each characterized by its own set of symptoms and physical findings.Acute Aortic RegurgitationAcute AR presents with a sudden onset of severe symptoms. Patients typically experience profound dyspnea (shortness of breath), chest pain, and signs of left...
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Aneurysm I: Introduction01:30

Aneurysm I: Introduction

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An aortic aneurysm is a localized outpouching or dilation at a weak point in the artery wall. It may involve different parts of the aorta, such as the abdominal aorta, aortic arch, or thoracic aorta.Etiological factorsSeveral disorders are associated with aortic aneurysms.Congenital causes, such as primary connective tissue disorders like Marfan syndrome, impact the integrity and strength of connective tissues, notably affecting the aorta. Marfan syndrome is a genetic disorder that specifically...
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Related Experiment Video

Updated: Feb 22, 2026

Author Spotlight: Using Point-of-Care Ultrasound for Comprehensive Evaluation of the Abdominal Aorta
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How does descending aorta geometry change when it dissects?

Bartosz Rylski1, Camila Muñoz1, Friedhelm Beyersdorf1

  • 1Department of Cardiovascular Surgery, Heart Center Freiburg University, Faculty of Medicine, University of Freiburg, Freiburg, Germany.

European Journal of Cardio-Thoracic Surgery : Official Journal of the European Association for Cardio-Thoracic Surgery
|September 29, 2017
PubMed
Summary

Acute type B aortic dissection significantly increases descending thoracic aorta diameter and length. Predissection aortic diameter closely matches post-dissection true lumen diameter, aiding in treatment planning.

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Area of Science:

  • Cardiovascular Surgery
  • Vascular Imaging
  • Aortic Diseases

Background:

  • Thoracic endovascular aortic repair is the standard treatment for complicated acute type B aortic dissection.
  • Understanding pre-dissection aortic diameter is crucial for treatment but remains poorly understood.
  • Changes in descending aortic geometry due to dissection require further delineation.

Purpose of the Study:

  • To delineate changes in descending aortic geometry caused by acute type B aortic dissection.
  • To compare aortic geometry before and immediately after the onset of dissection.

Main Methods:

  • Retrospective review of 802 patients from five tertiary centers' acute aortic dissection type B databases.
  • Inclusion criteria: patients with computed tomography angiography scans <2 years pre-dissection and immediately post-dissection.
  • Comparison of aortic geometry (diameter, length) before and after dissection onset.

Main Results:

  • Twenty-five patients were included; 96% had a maximum descending aortic diameter <45 mm pre-dissection.
  • Dissection significantly increased proximal descending aorta diameter by +6.4 mm (23%, P < 0.001) and thoracic descending aorta length by +8.0 mm (P = 0.003).
  • Predissection proximal thoracic descending aorta diameter was significantly larger than post-dissection true lumen diameters.

Conclusions:

  • Acute type B aortic dissection leads to increased diameter, length, and volume of the descending thoracic aorta.
  • The predissection aortic diameter serves as a reliable predictor of the post-dissection maximum true lumen diameter.