Figure 1: ECCS of the right internal carotid artery: alternating blood flow before (A) and parvus-tardus waveform type after (B) the right middle cerebral artery thrombectomy and normal blood flow (C) after innominate artery endarterectomy. TCCS, transforaminal examination of both vertebral arteries: retrograde blood flow in the right V4 segment (D, arrow) before and antegrade blood flow in both V4, slightly weaker in the right (E, arrow) after the innominate artery endarterectomy