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Aneurysm - Coggle Diagram
Aneurysm
Epidemiology
True aneurysm
Bound by arterial/heart wall
Wall intact but weakened
Fusiform shape
Diffuse circumferential dilation
Saccular shaped
One sided dilation
False aneurysm
Breach in vascular wall
Extravascular haematoma freely communicates with intravascular space
Types based on cause
Atherosclerotic
Seen in abdominal aorta
Males >50 yrs
Fusiform, several cms
Distal to renal arteries
Berry
Capillary microaneurysm
Syphilitic
Mycotic (infective)
Abnormalities of CT structure/function
Scurvy
Clinical Manifestations
Atherosclerotic aneurysm
Rupture
Haemorrhage into peritoneal cavity
Often fatal
Thrombosis
Shed emboli into peripheral arteries
Local ischaemia
Consequences
None
Pressure on adjacent structures
Occlusion by thrombus
Completel occlusion ---> ischaemia
Rupture
Haemorrhage into space