Related Experiment Video
Updated: Apr 7, 2026
05:31
Murine Model of Thoracic Aortic Dissection Induced by Oral β-Aminopropionitrile and Subcutaneous Angiotensin II Infusion
Published on: May 16, 2025
1.3K
[Loeys-Dietz syndrome: aortic dissections and aneurysms]
Ernst Cancrinus1, Arjan W J Hoksbergen, Gerard J Pals
1VUmc, Amsterdam.
Nederlands Tijdschrift Voor Geneeskunde
|July 2, 2015
Summary
Loeys-Dietz syndrome can present with severe vascular issues like aortic dissection without typical physical signs. Early recognition of these acute symptoms is crucial for timely treatment and improved outcomes in this rare genetic disorder.
Area of Science:
- Genetics
- Cardiovascular Medicine
- Connective Tissue Disorders
Background:
- Loeys-Dietz syndrome is a hereditary connective tissue disorder.
- It is characterized by life-threatening vascular abnormalities, including aneurysms and dissections.
- Prompt recognition of acute clinical presentations is vital for effective management.
Observation:
- A family presented with acute Loeys-Dietz syndrome manifestations, notably lacking typical physical features.
- One member experienced type B and type A aortic dissections and iliac artery aneurysm rupture.
- Two siblings also presented with type B aortic dissections and thoraco-abdominal aortic aneurysms.
Findings:
- Genetic analysis identified a mutation in the transforming growth factor beta (TGFβ) type 2 receptor gene.
- The family members exhibited severe vascular pathology consistent with Loeys-Dietz syndrome.
- Absence of characteristic physical findings did not preclude the diagnosis.
Implications:
- Loeys-Dietz syndrome can manifest acutely with severe vascular events, even without typical physical stigmata.
- Timely diagnosis based on clinical presentation and genetic testing is essential.
- Early intervention may improve prognosis for patients with this rare hereditary condition.
Related Concept Videos
01:30Aneurysm I: Introduction
618
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...
618
01:21Aneurysm II: Clinical Manifestations and Diagnostic Studies
537
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...
537
01:22Aortic Regurgitation II: Clinical Features and Diagnostic Tests
929
Aortic valve regurgitation (AR) occurs when the aortic valve fails to close properly, allowing blood to flow backward from the aorta into the left ventricle. This backflow can result in two distinct clinical presentations: acute and chronic AR, each characterized by its own set of symptoms and physical findings.Acute Aortic RegurgitationAcute AR presents with a sudden onset of severe symptoms. Patients typically experience profound dyspnea (shortness of breath), chest pain, and signs of left...
929
01:26Aneurysm III: Interprofessional Care
454
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...
454
01:15Aortic Regurgitation I: Introduction
1.3K
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...
1.3K
01:22Lysosomal Hydrolases
4.8K
Lysosomes are the site for the degradation of macromolecules and biological polymers released during membrane trafficking events such as secretory, endocytic, autophagic, and phagocytic pathways. The membrane-enclosed area of the lysosome, called the lumen, contains hydrolytic enzymes active in an acidic environment. These acid hydrolases are functional at a pH between 4.5 and 5 and are involved in cellular processes such as cell signaling, energy metabolism, restoration of the plasma membrane,...
4.8K