Pathology of the Aorta Flashcards
Arteriosclerosis
Arterial vascular system becomes thick and stiff, which can lead to restriction of blood flow to the organs
Atherosclerosis
Speciifc form of arterioscleosis
with development of arteriosclerosis
blood vessels become stiff and inelastic, resulting in higher blood pressure
Plaque
Build up of fats, cholesterol and other substances
Plaques may do what?
Burst and trigger a blood clot or thrombus to form in the artery
Is atherosclerosis preventable
Yes
Early atherosclerosis
gradual, no symptoms
Moderate to severe atherosclerosis
Heart (pain or angina)
Brain (stroke like symptoms)
Arms and legs (pain with exercise)
Kidneys (high BP or kidney failure)
Atherosclerosis is what kind of disease
Slow and progressive
AAA
a localized dilation of the abdominal aorta, usually larger than 3cm or 1.5 times the diameter of the proximal aorta
AAA tend to be what kind of aneurysm
true (involves all three layers)
Factors that may lead to the development of AAA
Atherosclerosis Trauma to chest Tobacco use hypertension Genetic conditions
Most aneurysms are
Infrarenal
with a larger aneurysm
Mural thrombus is common
Aortic pseudoaneurysm is related to what
trauma
After 5cm what is considered
Surgery
what might impair visualization of renal arteries
Bowel gas
Clinical symptoms of AAA
Usually asymptomatic
Throbbing or deep pain in the abdomen, back or flank that radiates to other areas
Rupture
Grey Turners Sign
Associated with an extensive bleed in the retroperitoneal cavity
Less than 4cm
Follow up every 6 months, intervention if the patient becomes symptomatic
4-5cm
Surgery or repair may be recommended if patient is in good health
5-6cm
benefit from repair
True aneurysm forms when
Tensile strength of the wall decreases
Most common presentation of atherosclerotic anuesyem
Fusiform aneurysm
Saccular aneurysm
the sudden transition between normal and abnormal, spherical and larger
Large aneurysm may cause what
compress neighbouring structures
Obstruction of CBD
hypertension and renal ischemia of renal artery
Normal iliac arteries
Less than 1cm
Rupture of AAA
Usually fatal (50%)
Signs of AAA rupture
Abdo pain
shock
expanding abdo mass
Appearance of AAA
Focal dilation of the aorta of lack of distal tapering