Fig. 3From: Room tilt illusion and subclavian steal – a case reportDiagnostic ultrasound using (a) transcranial color-coded sonography (transforaminal approach) showing retrograde flow in the left V4-VA with velocity 116 cm/s. b Extracranial duplex, longitudinal plane, showing complete retrograde flow in the left V2-VA with velocity 116 cm/sBack to article page