Usually 24-48 hours
Endarterectomy is the gold standard for symptomatic carotid disease.
Recovery can be quick - just 24-48 hours. Many surgeons have a 2% peri operative rate of stroke
, less than 1% risk of peri operative death. There is some risk to nerves that control the voice box but should an injury occur it is usually temporary. The key is to ask your surgeon what his personal complication rates are.