What is a mycotic aortic aneurysm?

What is a mycotic aortic aneurysm?

A mycotic aortic aneurysm (MAA), synonymously known as infected aortic aneurysm, is an aortic aneurysm due to infection. Mycotic aortic aneurysm most commonly develops through microbial inoculation of the diseased aortic endothelium during bacteremia.

What causes a mycotic aneurysm?

Mycotic aneurysms are generally found in the distal branches of the cerebral arteries and are usually caused by infectious endocarditis or aspergillosis. The most common organism causing mycotic aneurysms today is Staphylococcus aureus.

How to diagnose an Intracranial mycotic aneurysm?

Intracranial mycotic aneurysms can be evaluated with CT, MRI, or angiography 1-5,9. Classically, the peripheral location of intracranial mycotic aneurysms allows them to be differentiated from berry aneurysms 1-4, however more proximal aneurysms can be impossible to differentiate from berry aneurysms on any imaging modality 9.

What causes a mycotic aneurysm in the heart?

Mycotic aneurysms are aneurysms arising from infection of the arterial wall, usually bacterial. It is a complication of the hematogenous spread of bacterial infection, classically from the heart . Mycotic aneurysms are thought to represent only a minority of (0.65-2.6%) of all aortic aneurysms 10-13.

Which is a minority of aortic aneurysms 10-13?

Mycotic aneurysms are thought to represent only a minority of (0.65-2.6%) of all aortic aneurysms 10-13. The epidemiology of mycotic aneurysms mirrors that of identifiable risk factors: The vessel wall becomes infected with bacteria, is digested, and false aneurysm forms, which is unstable and highly prone to rupture.

How is the clinical manifestation of an infected aneurysm determined?

The clinical manifestations of infected aneurysm can be determined by the location, infecting organism, and whether it is caused by primary arteritis or an infection of pre-existing aneurysm.

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