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Table 1 Clinical characteristics of patients with a symptomatic ICA occlusion ( n= 24)

From: Comparison of oxygen-15 PET and transcranial Doppler CO2-reactivity measurements in identifying haemodynamic compromise in patients with symptomatic occlusion of the internal carotid artery

Characteristics Number of patients (%)
Age (years, mean ± SD) 64 ±10
Male 20 (83)
Clinical features at presentation:
cerebral TIA 17 (71)
ischaemic stroke 7 (29)
Repeated symptoms after documented occlusion 22 (92)
Systolic blood pressure (mmHg, mean ± SD) 158 ±28
Diastolic blood pressure (mmHg, mean ± SD) 86 ±14
Vascular risk factors:
Hypertensiona 20 (83)
Hyperlipidaemiab 22 (92)
Diabetes mellitus 6 (25)
Cigarette smoking (current or in last 5 years) 13 (54)
History of stroke > 3 months ago 7 (29)
History of ischaemic heart disease 8 (33)
MRI:
Ischaemic lesions in MCA territory ipsilateral to ICA occlusion: 11 (45)
endzone branche 3  
large subcortical (> 1.5 mm) 3  
cortical borderzone 5  
Angiogram:
Bilateral ICA occlusion 1 (4)
Contralateral ICA stenosis ≥50% 9 (38)
Ipsilateral ECA stenosis ≥50% 6 (25)
Vertebral artery stenosis ≥50% 9 (38)
Collateral flow via anterior communicating artery 22 (92)
Collateral flow via ophthalmic artery 11 (46)
Collateral flow via posterior communicating arteryc 20 (83)
Leptomeningeal collateralsd 17 (71)
  1. aHypertension was defined as blood pressure > 160/95 mmHg or current use of antihypertensive medication. bHyperlipidaemia was defined as either a history of hyperlipidaemia, current use on statins or levels of total cholesterol, triglycerids or high density lipoprotein cholesterol outside the normal ranges. cPresence of collateral flow via the posterior communicating artery could not be judged in 1 patient. dPresence of leptomeningeal collaterals could not be judged in 1 patient.