The aim of this study is to establish a prospective cohort of patients with cervical/intracranial arteries stenosis in China.

A prospective cohort of patients with cervical/intracranial arteries stenosis from various regions of China will be established. This prospective cohort is used to identify the distribution of risk factors in the patients with cervical/intracranial arteries stenosis.

Inclusion Criteria:

1. Age ≥ 40 and ≤ 80 years;
2. Ultrasound or imaging examinations indicating cervical artery stenosis and/or intracranial artery stenosis (including mild, moderate, severe stenosis, or occlusion);
3. Willing to participate and signing the informed consent form.

Exclusion Criteria:

1. Patients with stroke occurring within the past year;
2. Patients with severe systemic diseases, such as respiratory failure, renal failure, gastrointestinal bleeding, coagulation disorders, malignancies, etc.;
3. Patients with a life expectancy of less than one year or those who are unable to complete the study for other reasons.

Patients who were diagnosed with cervical artery stenosis and/or intracranial artery stenosis.