Figure 1.

Macroscopy and histology of filters containing captured material following TAVI and representative histological appearance (haematoxylin-eosin [H&E] stain) of tissue types encountered as filter content. A) & B) Proximal and distal filter, respectively, as submitted to the pathology laboratory. C) Myocardium (asterisk) and adjacent subendocardium (arrow), 20x magnification. D) Aortic valve material with myxoid change, 10x magnification. E) Endocardial endothelium (arrow) and subendocardial tissue (asterisk), 20x magnification. F) Necrotic (asterisk) and calcified (arrow) amorphous material, presumably debris from a calcified aortic valve, 20x magnification.