This study evaluates the effectiveness of fimasartan-based antihypertensive treatment and prognosis in post-acute phase of ischemic stroke or transient ischemic attack patients. All participants will receive fimasartan, and the investigators will follow them up for 6 months.

Inclusion Criteria:

• Ischemic stroke or transient ischemic attack occurs after 7 days to 3 months.
• Mean blood pressure measured 3 times at the first visit (Visit 1) should be over 140 mmHg for systolic blood pressure or 90 mmHg for diastolic blood pressure
• Suitable for administration of fimasartan
• The life expectancy should be over 6 months.

Exclusion Criteria:

• Patients already treated with antihypertensive medications
• Hemorrhagic stroke patients

1,032 subjects of post-acute phase of ischemic stroke or transient ischemic attack patients