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Related Concept Videos

Development of Blood Vessels01:07

Development of Blood Vessels

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The development of the vascular system in a fetus is a complex and intricate process that begins as early as 15 to 16 days post-conception. This process starts outside the embryo, specifically in the mesoderm of the yolk sac, chorion, and connecting stalk. Approximately two days later, the formation of blood vessels occurs within the embryo itself.
The initial formation of this system is facilitated by the small amount of yolk present in the ovum and yolk sac. Blood vessels originate from...
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Aneurysm I: Introduction01:30

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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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Vascular Spasm01:16

Vascular Spasm

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The vascular phase, also known as vasospasm, is the initial stage of hemostasis, crucial for preventing excessive bleeding when a blood vessel is injured. After a vessel is cut, nerves in the damaged area trigger pain and other sensory impulses. Simultaneously, the smooth muscles in the vessel wall contract, resulting in a vascular spasm. This contraction reduces the vessel's diameter at the injury site, slowing or stopping blood loss through the vessel wall. Vascular spasms typically last...
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The Contractile Ring02:15

The Contractile Ring

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Contractile rings are composed of microfilaments and are responsible for separating the daughter cells during cytokinesis. Contractile ring assembly proceeds along with other cell cycle events; however, very few mechanistic details are known about the timing and coordination of the contractile rings with the cell cycle.
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Varicose Veins I: Introduction01:26

Varicose Veins I: Introduction

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Varicose veins, or varicosities, are abnormally dilated and twisted superficial veins caused by venous valve incompetence. This condition commonly affects the lower extremities, especially the saphenous veins, due to the higher pressure from prolonged standing and walking. However, varicosities can also occur in other areas, such as the esophagus, vulva, spermatic cords, and anorectal region.Etiology and typesPrimary varicose veins, often idiopathic, are more common in women due to inherent...
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Veins01:17

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Veins are an integral part of our circulatory system, serving as the blood vessels that transport blood from all body regions to the heart. They are a network of hollow tubes that carry blood low in oxygen from the body's cells back to the heart for reoxygenation. Veins are crucial for maintaining the body's overall fluid balance and the continuous circulation of blood.
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Updated: Jan 4, 2026

Aortic Ring Assay
09:12

Aortic Ring Assay

Published on: November 24, 2009

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Congenital vascular ring.

Naoki Yoshimura1, Kazuaki Fukahara2, Akio Yamashita2

  • 1First Department of Surgery, University of Toyama, Graduate School of Medicine, 2630 Sugitani, Toyama, 930-0194, Japan. ynaoki@med.u-toyama.ac.jp.

Surgery Today
|November 3, 2019
PubMed
Summary
This summary is machine-generated.

Vascular rings, rare congenital anomalies, compress airways and esophagus. Early surgical intervention for symptomatic cases leads to excellent outcomes and low risks.

Keywords:
Double aortic archMultidetector computed tomographyThoracoscopic surgeryTracheoesophageal compressionVascular ring

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Area of Science:

  • Cardiovascular Surgery
  • Congenital Anomalies
  • Embryology

Background:

  • Vascular rings are rare congenital cardiovascular anomalies.
  • They encircle and compress the trachea or esophagus, or both.
  • Understanding embryonic development of the aortic arch is crucial for classification.

Purpose of the Study:

  • To review the pathophysiology, embryopathogenesis, diagnostics, and surgical treatment of vascular rings.
  • To highlight the importance of embryonic aortic arch development.
  • To discuss the role of multi-detector computed tomography (MDCT) in diagnosis and evaluation.

Main Methods:

  • Review of existing literature on vascular rings.
  • Discussion of embryological development of aortic arch derivatives.
  • Evaluation of diagnostic modalities, particularly MDCT.
  • Analysis of surgical treatment outcomes.

Main Results:

  • Vascular ring variations arise from the persistence, involution, or regression of embryonic aortic arches.
  • Multi-detector computed tomography (MDCT) is an effective diagnostic tool for evaluating aortic arch abnormalities and tracheal pathology.
  • Surgical division of symptomatic vascular rings typically results in excellent outcomes with symptom resolution and low morbidity/mortality.

Conclusions:

  • Symptomatic vascular rings necessitate prompt surgical intervention to avert serious complications from prolonged compression.
  • Early surgical treatment ensures optimal patient outcomes.
  • MDCT aids in precise pre- and postoperative assessment.