Carotid ultrasound examination is recommended in patients with an increased risk of ischemic stroke. People suffering from frequent headaches, dizziness, fainting, and especially patients with hypertension, diabetes and / or atherosclerosis should undergo it. Periodic control of the condition of the carotid arteries is indicated in people who have suffered an ischemic stroke or in the case of the so-called transient ischemic attacks (TIA). Doppler ultrasound is also used to assess the effects of treatment after surgical plaque removal.