Tehran University Medical Journal

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This is a prospective descriptive research which was carried out in Imam Khomeini Hospital related to Tehran University during two years (1375-1377) in order to study the incidence of internal carotid stenosis in patients who suffered from TIA ot minor stroke. It was evaluated by duplex sonography. Risk factors of carotid stenosis were studied. 1052 patients who had cerebrovascular accident admitted to Imam Khomeini Hospital and 100 of them who suffered from TIA or minor stroke were selected. The data was gathered by questionnaire and analysed. According to the results of the research, the incidence of internal carotid stenosis was 81%. The incidence of severe stenosis (>70%) was 20%, moderate stenosis (30-69%) was 36%, and mild stenosis (<29%) was 44%. There was a significant relationship between hyperlipidemia, diabetes mellitus and alcohol consumption, with internal carotid stenosis. There was no significant relationship between hypertension and cigarette smoking with internal carotid stenosis. There was a significant relationship between history of angina pectoris or myocardial infarection with severity of internal carotid stenosis. We suggest to consider duplex sonography as a part of evaluation of patients who suffer from TIA or minor stroke for screening of severe internal carotid stenosis. Control and treatment of risk factors are useful preventive measures that can reduce the incidence of carotid artery stenosis and cerebrovascular accidents

Keywords: Transient ischaemic attack, Duplex sonography

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