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Related Concept Videos

Aneurysm I: Introduction01:30

Aneurysm I: Introduction

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...
Aneurysm II: Clinical Manifestations and Diagnostic Studies01:21

Aneurysm II: Clinical Manifestations and Diagnostic Studies

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...
Aneurysm III: Interprofessional Care01:26

Aneurysm III: Interprofessional Care

Aneurysm management involves either conservative medical therapy or surgical intervention, depending on the size and symptoms of the aneurysm. Conservative management is generally reserved for smaller, asymptomatic aneurysms, while larger or symptomatic aneurysms often necessitate surgical repair.Conservative Medical TherapyFor small, asymptomatic aneurysms, particularly abdominal aortic aneurysms (AAA) less than 5.5 centimeters in diameter, conservative medical therapy is recommended. This...
The Aorta01:14

The Aorta

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...
Abdominal Aorta01:25

Abdominal Aorta

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...
Aortic Regurgitation I: Introduction01:15

Aortic Regurgitation I: Introduction

IntroductionAortic regurgitation is characterized by the backward flow of blood from the aorta into the left ventricle during diastole and arises from the improper closure of the aortic valve. This condition results in left ventricular volume overload and can stem from both acute and chronic etiologies, each contributing uniquely to the disease's progression and symptomatology.Acute and Chronic CausesAcute aortic regurgitation often results from events that suddenly impair the integrity of the...

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Related Experiment Video

Updated: Jun 18, 2026

Novel and Innovative Hybrid Technique for Type A Aortic Dissection
06:26

Novel and Innovative Hybrid Technique for Type A Aortic Dissection

Published on: March 28, 2025

Helical classification of type B aortic dissections.

Johan Bondesson1, Shanmugesh Raja1, Ga-Young Suh1,2

  • 1Division of Vascular Surgery, Stanford University, Stanford, Calif.

JTCVS Structural and Endovascular
|June 17, 2026
PubMed
Summary
This summary is machine-generated.

Type B aortic dissections exhibit distinct helical patterns influencing blood flow to the celiac artery (CA). Understanding this aortic dissection helicity is key for improved diagnostics and treatments.

Keywords:
false lumenostial avulsionrenovisceral perfusionspiral morphologythoracic aortic dissectiontrue lumen

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Last Updated: Jun 18, 2026

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Area of Science:

  • Cardiovascular Research
  • Medical Imaging
  • Anatomy

Background:

  • Spiraling aortic dissections are anecdotally reported but lack mechanistic understanding.
  • Dissection propagation patterns in type B aortic dissections remain unclear.

Purpose of the Study:

  • To categorize type B aortic dissection helicity.
  • To mechanistically explain distinct dissection propagation patterns.
  • To improve understanding of aortic dissection anatomy and pathophysiology.

Main Methods:

  • Geometric modeling of type B dissections from computed tomography scans of 102 patients.
  • Quantification of helical properties from the entry tear to the renovisceral aorta.

Main Results:

  • Four distinct helical groups were identified: right-hand chiral, left-hand chiral, mixed-chiral, and nonhelical.
  • Chiral dissections (right- and left-hand) typically supply the celiac artery (CA) from the left true lumen.
  • Mixed-chiral and nonhelical dissections predominantly supply the CA from the right.

Conclusions:

  • Chirality in the aorta influences dissection propagation and true lumen supply to the CA.
  • Mixed-chiral dissections often reverse spiraling direction to supply the CA via the true lumen.
  • This mechanistic understanding can enhance diagnostics and treatments for aortic dissections.