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Related Concept Videos

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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Coronary Artery Disease I: Introduction01:30

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Coronary Artery Disease (CAD): An Overview with Scientific InsightsCoronary Artery Disease (CAD), often referred to as C-A-D, is a prevalent blood vessel disorder classified under the broader category of atherosclerosis. Atherosclerosis is a pathological process characterized by the hardening and narrowing of arteries due to the accumulation of atherosclerotic plaques. These plaques are composed of cholesterol, fatty substances, inflammatory cells, calcium, and fibrin, reducing blood flow to...
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Aneurysm II: Clinical Manifestations and Diagnostic Studies01:21

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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 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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Atherosclerosis is a progressive disorder that leads to the thickening and narrowing of arterial walls due to plaque buildup. This condition can cause various symptoms depending on the arteries affected:Coronary Artery Disease (CAD): This condition affects the coronary arteries and may lead to chest pain (angina), shortness of breath (dyspnea), heart attacks, and other heart disease symptoms.Cerebrovascular Disease: This affects blood flow to the brain, causing transient ischemic attacks (TIAs)...
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Peripheral artery disease (PAD) predominantly results from atherosclerosis, which involves the accumulation of fatty deposits, or plaques, within the walls of arteries. This causes them to narrow and harden, significantly reducing blood flow. PAD predominantly affects the legs, particularly the arteries supplying the thighs and calves. In rare cases, it may involve other arteries, including those in the arms.Etiology of PAD:The principal cause of PAD is atherosclerosis, which results from fatty...
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Predictors of Abdominal Aortic Aneurysm Risks.

Stephen J Haller1, Amir F Azarbal2, Sandra Rugonyi1

  • 1Department of Biomedical Engineering, Oregon Health & Science University, Portland, OR 97239, USA.

Bioengineering (Basel, Switzerland)
|July 26, 2020
PubMed
Summary
This summary is machine-generated.

Finite element analysis (FEA) shows peak wall stress (PWS) better predicts abdominal aortic aneurysm (AAA) rupture risk. Personalized biomechanical assessment requires improved patient-specific wall strength estimation, potentially using artificial intelligence.

Keywords:
abdominal aneurysmaorta biomechanicsaortic aneurysmaortic wall stressrisk assessmentrupture potential index

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Area of Science:

  • Biomedical Engineering
  • Computational Mechanics
  • Cardiovascular Research

Background:

  • Abdominal aortic aneurysm (AAA) rupture risk assessment currently relies on size-based criteria, which have limitations.
  • Computational biomechanics, particularly finite element analysis (FEA), offers a promising alternative for patient-specific risk evaluation.
  • AAA rupture is hypothesized to occur when mechanical wall stress surpasses the tissue's inherent strength.

Purpose of the Study:

  • To review studies investigating the relationship between biomechanics and AAA rupture risk.
  • To highlight the importance of quantifying both wall stress and wall strength for improved risk prediction.
  • To identify current limitations and future directions for personalized biomechanical AAA risk assessment.

Main Methods:

  • Review of existing literature on computational biomechanics and AAA rupture.
  • Analysis of studies focusing on peak wall stress (PWS) quantification using FEA.
  • Discussion of challenges in non-invasively estimating patient-specific aortic wall strength.

Main Results:

  • Peak wall stress (PWS) is a superior indicator for differentiating ruptured from non-ruptured AAAs compared to size-based metrics.
  • Significant advancements have been made in sophisticated wall stress modeling.
  • Estimating patient-specific wall strength remains a major challenge due to inherent tissue variability and non-invasive measurement difficulties.

Conclusions:

  • Combining accurate estimations of both wall stress and wall strength is crucial for improving AAA rupture risk prediction.
  • Development of methods for estimating patient-specific wall properties or surrogate markers of aortic wall degradation is essential for clinical translation.
  • Artificial intelligence (AI) holds potential for patient stratification and enabling personalized biomechanical AAA risk assessment.