Penetrating Aortic Ulcer

Penetrating aortic ulcer is a focal defect in an atherosclerotic aortic wall that extends from the lumen into the underlying media, making it an important cause of acute aortic syndromes. The process begins when an ulcerated plaque breaches the intima and internal elastic lamina, allowing blood to enter the media and potentially form an intramural hematoma, pseudoaneurysm, or rupture. Computed tomography angiography helps identify the ulcer, assess associated wall injury, and monitor changes over time. Clinical assessment and imaging guide treatment, which may include medical risk-factor control, surveillance, or endovascular or open repair for high-risk disease.

Penetrating Aortic Ulcer - Related Videos

Research

JoVE Journal - Medicine

Full-root Aortic Valve Replacement by Stentless Aortic Xenografts in Patients with Small Aortic Roots

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Cited by 4 •

2017

Full-root aortic valve replacement by stentless aortic xenograft is a viable option in patients with small aortic roots. We describe, a technique for the full-root implantation of stentless aortic xenografts, with emphasis on the management of the proximal suture line and coronary anastomoses, and discuss its limitations and alternative options.

Aortic Ring Assay

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Cited by 42 •

2009

Angiogenesis, the sprouting of blood vessels from pre-existing vasculature, is associated with both natural and pathological processes. Here we demonstrate an aortic ring assay that allows angiogenic potentiators and inhibitors to be directly added to aortic rings in culture. Sprouting and neovessel outgrowth can be determined by inspecting the aortic rings over a period of 6-12 days.

Construction of Cyclic Cell-Penetrating Peptides for Enhanced Penetration of Biological Barriers

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Cited by 5 •

2022

This protocol describes the synthesis of cyclic cell-penetrating peptides with aromatic cross-links and the evaluation of their permeability across biological barriers.

Shifting Zebrafish Lethal Skeletal Mutant Penetrance by Progeny Testing

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Cited by 8 •

2017

The goal of this protocol is to alter the penetrance of lethal skeletal mutant phenotypes in zebrafish by selective breeding. Lethal mutants cannot be grown to adulthood and bred themselves, therefore this protocol describes a method for tracking and selecting penetrance through multiple generations by progeny testing.

Education

JoVE Core - Microbiology

Peptic Ulcer

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2026

Peptic ulcers are erosive lesions of the gastric or duodenal lining, most commonly caused by Helicobacter pylori infection. This Gram-negative, helical bacterium has adapted to survive the stomach’s acidic environment by producing urease, which converts urea into ammonia and carbon dioxide. The ammonia neutralizes gastric acid in the bacterium’s immediate environment, allowing colonization of the gastric mucosa. H. pylori attaches to mucus-secreting epithelial cells, penetrates the mucus...

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