463-129 |Doppler Study of the Left Common Carotid Artery with Pre-occlusive Stenosis-Doppler Study of the Left Common Carotid Artery with Pre-occlusive Stenosis

Doppler Study of the Left Common Carotid Artery with Pre-occlusive Stenosis

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This case report discusses the findings of a 33-year-old woman who was referred for a thyroid ultrasound due to complaints of neck pain, difficulty swallowing, and voice change. During the ultrasound, preocclusive stenosis of the left common carotid artery (CCA) was detected. Multiple collateral pathways were observed, including retrograde flow in the ipsilateral external carotid artery and antegrade flow in the internal carotid artery. Doppler ultrasound was used to evaluate the stenosis and map the collateral pathways. The patient had no history of hypertension, diabetes, or other chronic illnesses, and there were no signs of exposure to chemicals or unfavorable environmental conditions.<br /><br />The study highlights the rarity of preocclusive stenosis of the CCA and the lack of published information about this condition compared to stenosis of the internal carotid artery (ICA). It emphasizes the importance of recognizing patency in the internal and external carotid arteries, as carotid stenosis or occlusion can lead to stroke or transient ischemic attack. Symptoms can include motor or sensory deficits and amaurosis fugax.<br /><br />The case report concludes that Doppler ultrasound is a valuable modality for evaluating preocclusive stenosis of the CCA and mapping collateral pathways. It notes that in cases of high-grade stenosis, blood flow velocity may be decreased instead of increased. The report suggests that multiple collateral pathways can develop to compensate for the drop in velocity caused by the stenosis.<br /><br />Overall, this case report provides insights into the diagnosis and management of preocclusive stenosis of the CCA and highlights the importance of Doppler ultrasound in evaluating this condition.

Keywords

thyroid ultrasound

preocclusive stenosis

common carotid artery

collateral pathways

Doppler ultrasound

stroke

transient ischemic attack

motor deficits

sensory deficits

diagnosis