ASSISTENT is designed to collect comprehensive information on technical and clinical safety of the use of Credo® stent together with the NeuroSpeed® PTA balloon catheter in clinical practice in an open registry.

ASSISTENT is subdivided into two components. The first part only requires recording of data acquired in routine clinical practice during the treatment of patients with intracranial stenosis with the self-expandable Credo® stent until discharge. This comprises demographic data, data concerning the qualifying clinical event, limited data on medical history and medication, information about the intervention including technical success and periprocedural complications or events, and information about events and clinical status during the in-hospital treatment until hospital discharge.

The second part of the registry consists of a follow-up visit 30 days after the interventional procedure which will be conducted outside of clinical practice.

Inclusion Criteria:

- Treatment with Credo® for symptomatic atherosclerotic intracranial artery stenosis (see product IFU)

Exclusion Criteria:

• There are no specific exclusion criteria (see product IFU)

All patients over 18 with symptomatic intracranial artery stenosis treated with the self-expandable Credo® stent in the participating sites in clinical practice.