Table 1

 Estimated stroke risk in patients with carotid artery disease undergoing coronary artery bypass grafting (after Naylor et al7) and operative death and stroke rate in our unit

No significant carotid artery diseaseUnilateral 50–99% stenosisBilateral 50–90% stenosisCarotid occlusion and contralateral >70% stenosis
CABG, coronary artery bypass grafting.
CABG stroke risk∼2%∼3%∼5%∼7–11%
Stroke risk attributable to carotid disease0%∼1.5%∼2.5%∼3.5–5.5%
Operative risk of carotid endarterectomy at St Mary’s Hospitaln/a<2%<2%<4%