Fig 5.

Example of occlusion (group I-D 8-mm elliptical defect).

A, Photograph obtained immediately after lesion creation shows that the arterial lumen is compressed. It has a serpentine configuration, and a subadventitial hematoma is present.

B, Angiogram shows an occlusion.

C, Angiogram obtained after 2 hours shows that the vessel lumen has transiently recanalized.

D, Angiogram shows that the lumen has become occluded again in the subacute stage.

E, Photomicrograph shows that the subadventitial hematoma, which is already organized, compresses the arterial lumen (arrow) to cause a crescentic cross-sectional profile (elastica van Gieson stain, original magnification ×5).