Table 2.

Featured associated with increased risk in patient with asymptomatic carotid artery stenosis treated medically

Clinical	Controlateral transient ischaemic attack or stroke
Cerebral imaging	Ipsilateral silent infarction
Ultrasound imaging	Stenosis progression (> 20%) Spontaneous embolization of transcranial Doppler (high-intensity transient signal) Impaired cerebral vascular reserve Large plaques Echolucent plaques Increased juxta-luminal black (hypoechogenic) area
Magnetic resonance angiography	Intraplaque haemorrhage Lipid-rich necrotic core

Obtained from Ref.⁴³