Balloon embolus.
D002340:Carotid Artery Diseases / Q000209:etiology*; D002343:Carotid Artery, Internal / Q000601:surgery*; D004621:Embolization, Therapeutic / Q000009:adverse effects*; D006801:Humans; D002542:Intracranial Embolism and Thrombosis / Q000209:etiology*