During cerebrovascular angiography, which complication could arise at the access site?

In cerebrovascular angiography, complications at the access site can include arterial occlusion, which is a significant concern. This complication may occur when a thrombus (blood clot) forms at the site of access, obstructing blood flow through the artery. Given that the procedure involves catheter insertion into the arteries, any manipulation or trauma to the vessel can lead to damage, subsequently causing occlusion.

Factors contributing to arterial occlusion during the procedure may include disruption of the arterial wall, formation of a hematoma, or a dislodged plaque leading to an embolism. This complication can result in various degrees of ischemia or infarction in the territories supplied by the occluded artery, necessitating prompt recognition and management.

Other potential complications like thrombosis and subdural hematoma, while they can be related to the overall procedure and its risks, don't directly address what can happen specifically at the access site. Gastrointestinal bleed is unrelated to the access site complications of cerebrovascular angiography, as it pertains to vascular issues in the gastrointestinal tract rather than the cerebral vasculature.