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Table 1 Clinical characteristics and angiographic findings of patients with symptomatic occlusion of the internal carotid artery ( n= 23)

From: Intervention versus standard medical treatment in patients with symptomatic occlusion of the internal carotid artery: a randomised oxygen-15 PET study

  Intervention n = 12 Standard n = 11
Age (years, mean ± SD) 68 ± 10 60 ± 12
Male 12 7
Clinical features at presentation   
 Cerebral TIA 9 8
 Ischaemic stroke 3 3
Systolic blood pressure (mmHg, mean ± SD ) 159 ± 25 167 ± 29
Diastolic blood pressure (mmHg, mean ± SD) 84 ± 15 91 ± 13
Vascular risk factors   
 Hypertensiona 10 10
 Hyperlipidaemiab 10 10
 Diabetes mellitus 2 3
 Cigarette smoking (current or in last 5 years) 7 7
 History of stroke >3 months ago 3 4
 History of ischaemic heart disease 2 6
Angiogram   
 Contralateral ICA stenosis 50% to 69% 5 2
  Stenosis 70% to 99% 1 2
  Occlusion 0 1
Ipsilateral ECA stenosis ≥ 50% 4 1
Vertebral artery stenosis ≥ 50% 5 5
Collateral flow via anterior communicating artery 12 10
Collateral flow via ophthalmic artery 5 5
Collateral flow via posterior communicating artery 9c 11
Leptomeningeal collaterals 7d 9
  1. aBlood pressure > 160/95 mmHg or the current use of antihypertensive medication; bpatients with either a history of hyperlipidaemia, patients on statins or patients with levels of total cholesterol, triglycerids or high density lipoprotein cholesterol outside normal ranges; cthe presence of collateral flow via the posterior communicating artery could not be judged in one patient; dthe presence of leptomeningeal collaterals could not be judged in two patients.