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Published on: July 7, 2013
Intermittent, noncyclic dysfunction of a mechanical aortic prosthesis by pannus formation
Sylvie K Giroux1, Marino X Labinaz, Dominique Grisoli
1Division of Cardiology, University of Ottawa Heart Institute, Ontario, Canada.
Summary
Intermittent mechanical aortic prosthesis dysfunction, often linked to thrombus, can also stem from pannus formation. This case highlights pannus causing severe aortic regurgitation without typical disk restriction.
Area of Science:
- Cardiology
- Biomedical Engineering
- Cardiovascular Surgery
Background:
- Mechanical aortic prostheses are prone to dysfunction.
- Common causes include thrombosis and pannus formation.
- Pannus typically causes progressive stenosis by restricting disk movement.
Observation:
- Described is an unusual case of intermittent mechanical aortic prosthesis dysfunction.
- The dysfunction was attributed to pannus formation.
- Notably, this occurred without the usual systolic restriction of disk excursion.
Findings:
- The patient presented with intermittent massive aortic regurgitation.
- This led to severe ischemia and shock.
- The presentation mimicked intermittent dysfunction typically seen with thrombus.
Implications:
- Pannus formation should be considered in mechanical aortic prosthesis dysfunction.
- It can present as acute, intermittent severe aortic regurgitation.
- This challenges the typical understanding of pannus-induced mechanical valve dysfunction.
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