angiographic string sign

The angiographic string sign, also known as the carotid string sign or slim sign, refers to the thin string of intravascular contrast material distal to a stenotic focus in the internal carotid artery (ICA).

Pathology

A thin stripe of flow is caused by decreased pressure and flow distal to the stenosis, which causes a collapse of the distal ICA.

Etiology

An angiographic string sign may be caused by:

• pre-occlusive atherosclerosis at the carotid bifurcation
• ICA dissection
• ICA thrombosis
  • subacute partial
  • chronic subtotal
• partial recanalization of an occluded ICA
• stenosis secondary to radiation

Siehe auch:

• Karotisdissektion
• Thrombose Arteria carotis interna

und weiter:

• string sign