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Ultrasound examination was performed,on average,7.7 days after the first symptoms.The dissections subsequently were verified by MRI(16 patients), angiography(13 patients)or both(14 patients)on average 4.4 days later.The overall sensitivity of the combined examination was 95%(93%for extracranial Doppler,86%for transcranial Doppler,and 79%for duplex sonography.Duplex examination was helpful because it confirmed absent internal carotid artery flow or stump flow in the case of occlusion or high-grade stenosis(100%)and excluded an atherosclerotic origin by demonstrating a patent bulb(100%)and the absence of plaques(95%).Follow-up studies showed recanalization in 63%of patients,occurring at variable intervals.Occlusion persisted in 37%.Ultrasound performed within the first weeks can corroborate a clinically suspected carotid dissection in up to 95%of patients.Repetitive follow-up studies in most cases are sufficient to monitor evolution. |
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arterial dissection
arterial dissection,carotid
carotid artery
carotid artery disease
carotid artery occlusion,neck
cerebrovascular disease,noninvasive evaluation of
doppler
doppler,transcranial
duplex ultrasound
neurologic disease,diagnoses of
recanalization,arterial
ultrasonography
ultrasonography,carotid artery
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