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Histologic analysis of debris removed from the filters after carotid stenting. A, Low number of debris entrapped in the filter in a patient with low levels of inflammatory markers before carotid stent implantation. B, Elevated number of particles in a patient with high levels of inflammatory markers before the procedure. The debris entrapped in the filter was composed of acellular material rich in cholesterol cleft, necrotic material, and calcium precipitates.
