S2 L7.1 Diseases of the Aorta Flashcards
Conduit through which the blood ejected from the left
ventricle is delivered to the systemic arterial bed
AORTA
What is the diameter of the aorta?
○ 3 cm at the origin and in the ascending portion
○ 2.5 cm in the descending portion in the thorax
○ 1.8-2 cm in the abdomen
The following are true about the aortic wall, EXCEPT:
A. Thin intima composed of endothelium
B. Subendothelial connective tissue
C. Internal inelastic lamina
D. Thick tunica media composed of smooth muscle
cells and extracellular matrix
E. Adventitia composed primarily of Connective tissue
enclosing the vasa vasorum and nervi vascularis
F. None of the abovae
C. should be ELASTIC
T/F: The viscoelastic and compliant properties of the aorta
also subserve a buffering function
True
Pathologic dilatation of a segment of a blood vessel
AORTIC ANEURYSM
T/F: Proximal aneurysm is deadly because it is near the
branches
True
T/F: Commonly caused by hypertension and collagen
problems
True
Match the following tiems:
1. All three layers of the vessel wall
2. Intimal and medial layers are disrupted and the dilatation
is lined by adventitia only and, at times, by perivascular
clot
3. Affects the entire circumference of a segment of the
vessel, resulting in a diffusely dilated artery
4. Involves only a portion of the circumference, resulting in
an outpouching of the vessel wall
A. True Aneurysm
B. Pseudoaneurysm
C. Fusiform aneurysm
D. Saccular aneurysm
- A
- B
- C
- D
T/F about etiology of aortic aneurysm:
Result from conditions that cause degradation or
abnormal production of the aortic wall’s structural
components, elastin and collagen
True
Most common pathologic condition associated with
degenerative aortic aneurysms
ATHEROSCLEROSIS
Degeneration of collagen and elastic fibers in the tunica
media of the aorta, as well as the loss of medial cells that
are replaced by multiple clefts of mucoid material (weak
material)
CYSTIC MEDIAL NECROSIS
Match the following items:
1.Typically affect the thoracic aorta
2. Staphylococcal, streptococcal, Salmonella or other
bacterial or fungal infections of the aorta, usually at
an atherosclerotic plaque
3. Located in the ascending aorta or aortic arch
(proximal part)
A. Syphilitic Aneurysms
B. Tuberculous Aneurysms
C. Mycotic Aneurysm
- B
2.C - A
Identify which among the spefici causes of aortic aneurysm is being described:
● Inflammation of the arterial walls or autoimmune related
● Takayasu arteritis and giant cell arteritis
VASCULITIDES
Identify which among the spefic causes of aortic aneurysm is being described:
AS, RA, psoriatic arthritis, relapsing polychondritis, and
Reiter syndrome
Bechet syndrome
SPONDYLOARTHROPATHIES
Identify which among the spefic causes of aortic aneurysm is being described:
● May occur after penetrating or nonpenetrating chest
trauma
● Most commonly affect the descending thoracic aorta just
beyond the site of insertion of the ligamentum
arteriosum
TRAUMATIC ANEURYSMS
Identify what TYPE OF AORTIC ANEURYSM is being described:
● Clinical manifestations and natural history depend on their location
● Cystic medial necrosis is the most common cause ofnascending aortic aneurysms.
● Atherosclerosis is the condition most frequently
associated with aneurysms of the aortic arch and
descending thoracic aorta
● Most are asymptomatic
THORACIC AORTIC ANEURYSM