With the difficulty in diagnosing a<unk>  due to its nonspecific symptoms of neurologic dysfunction at presentation and a differential including many mimics, the exact incidence of the disease is unclear. It is currently estimated to have an incidence of approximately 200,000 to 500,000 cases per year in the US according to the American Heart Association.<unk>  incidence trends similarly to stroke, such that incidence varies with age, gender, and different race/ethnicity populations. Associated risk factors include age greater than or equal to 60, blood pressure greater than or equal to 140 systolic or 90 diastolic, and comorbid diseases, such as diabetes, hypertension, atherosclerosis, and atrial fibrillation. It is thought that approximately 15 to 30 percent of strokes have a preceding<unk>  episode associated.
Transient ischemic attack
Seizure
Subarachnoid hemorrhage
Epidural hematoma
Hemiplegic migraine
Ménière's disease  Ménière's disease  1
Watershed stroke
Migraine