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The pathology of cholesterol embolism arising as a complication of intra-aortic catheterization
A Kennedy1, D Cumberland, P Gaines
1Department of Histopathology, Northern General Hospital, Sheffield, UK.
Insights
Cholesterol embolism, a serious complication of arterial procedures, results from cholesterol crystals from aortic plaques. These micro-emboli are dislodged by catheters during interventions like angiography.
Area of Science:
- Vascular Medicine
- Pathology
- Interventional Cardiology
Background:
- Cholesterol embolism is a rare yet severe complication following intra-arterial interventions.
- Atherosclerotic plaques in the aorta are a known risk factor.
Purpose of the Study:
- To investigate the pathological basis of cholesterol embolism syndrome.
- To elucidate the origin and mechanism of cholesterol micro-emboli.
Main Methods:
- Analysis of pathological findings in four patient cases.
- Correlation of clinical procedures with observed pathology.
Main Results:
- Confirmed disseminated micro-emboli composed primarily of cholesterol crystals.
- Identified atheromatous plaques in the aorta as the source of these emboli.
- Demonstrated catheterization during procedures as a traumatizing event.
Conclusions:
- Cholesterol embolism syndrome stems from cholesterol crystals originating from aortic atheromatous plaques.
- Intra-arterial procedures, particularly angiography, can exacerbate pre-existing conditions leading to embolism.
- While not the sole cause, procedures significantly contribute to the manifestation of this syndrome.
Abstract:
Cholesterol embolism is an unusual but serious complication of intra-arterial procedures such as arteriography and angioplasty. The pathological findings in four cases confirm that this syndrome is due to disseminated micro-emboli composed mainly of cholesterol crystals and that these originate from atheromatous plaques in the aorta which may be traumatized by the catheter used in the intra-arterial procedure. However, angiography is not the sole precipitating cause of this syndrome but is an exacerbating event in a pre-existing process.