A 16 years young man with a history of minor head injury a year back and left sided PCA territory infarct 6 months ago underwent DSA revealing a dissecting aneurysm of the V4 segment of left vertebral artery just as it became intradural. He underwent stent assisted coiling. During procedure sudden spasm was noted as soon as the stent was opened (Image D) and the subsequent images (E to H) show relief after infusing nimodipine. Following achieving appearance similar to the control angiogram (Image A) coiling and complete occlusion of the aneurysm was done. The post procedure angiogram shows complete patency of the vertebral artery.

Stent induced spasm is a very rare entity and has to be differentiated the more commoner thrombosis. In this case only nimodipine can revert the artery back to its previous anatomy.