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Related Concept Videos

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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Aneurysm III: Interprofessional Care01:26

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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...
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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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Introduction
The abdominal examination is a cornerstone of clinical medicine, serving as a critical tool in diagnosing various gastrointestinal (GI) diseases. It involves a systematic approach that includes inspection and auscultation, each with distinct yet complementary roles in assessing the abdomen. This article will delve into these two primary methods healthcare professionals use to examine the abdomen.
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Vigilant monitoring for aneurysm rupture is essential for patients undergoing aortic surgery.Preoperative Nursing ManagementContinuously monitor the patient for manifestations of aneurysm rupture, such as pallor, weakness, tachycardia, hypotension, abdominal, back, groin, or periumbilical pain, changes in consciousness, and a pulsating abdominal mass. Regularly assess the patient's peripheral pulses.Instruct the patient to consume a clear liquid diet the day before surgery and administer...
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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.
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Mechanosignals in abdominal aortic aneurysms.

Christiana Lowis1,2, Aurellia Ramara Winaya1,2, Puja Kumari1,3

  • 1Division of Vascular and Endovascular Surgery, Department of Surgery, New York University Langone Medical Center, New York, NY, United States.

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|January 26, 2023
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Mechanical forces drive abdominal aortic aneurysm (AAA) development by triggering cellular signaling that degrades the extracellular matrix. Understanding these mechanotransduction networks offers new therapeutic targets for AAA.

Keywords:
abdominal aortic aneurysmmechanical stressmechanosignalsmechanotransductionshear stressvascular pathology

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Area of Science:

  • Cardiovascular Biology
  • Biomedical Engineering
  • Mechanobiology

Background:

  • Abdominal aortic aneurysms (AAA) are linked to mechanical and frictional forces in aortic layers.
  • These forces activate cellular mechanosensors, initiating signaling cascades.
  • This process leads to extracellular matrix (ECM) degradation and vascular remodeling, contributing to AAA progression.

Purpose of the Study:

  • To review and summarize current knowledge on mechanotransduction networks in AAA development.
  • To focus on mechanosensors and stressors within the AAA sac.
  • To explore the role of mechanotransduction in inflammation, oxidative stress, and ECM degradation.

Main Methods:

  • Literature review and synthesis of existing research on AAA mechanobiology.
  • Analysis of cellular mechanotransduction pathways involved in vascular remodeling.
  • Identification of key mechanosensors and stressors in AAA pathogenesis.

Main Results:

  • Mechanical cues orchestrate complex signaling cascades in multiple aortic cell types.
  • Mechanotransduction contributes significantly to inflammation, oxidative stress, and ECM degradation in AAA.
  • Specific mechanosensors and stressors within the AAA sac are identified as critical players.

Conclusions:

  • Mechanotransduction networks are central to AAA pathogenesis.
  • Targeting cellular mechanosensors and pathways presents a novel therapeutic strategy for AAA.
  • Further research into manipulating the 'mechano-machinery' is warranted for future AAA interventions.