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Noninvasive monitoring of internal carotid artery dissection
W Steinke1, W Rautenberg, A Schwartz
1Department of Neurology, University of Heidelberg, Klinikum Mannheim, Germany.
Insights
Doppler sonography can identify internal carotid artery dissection and track its healing. Most dissections showed recanalization within months, guiding clinical decisions.
Area of Science:
- Vascular Neurology
- Diagnostic Imaging
Background:
- Internal carotid artery dissection is a recognized cause of stroke.
- Limited data exist on the natural history and recanalization of these arterial lesions.
Purpose of the Study:
- To investigate the natural history of internal carotid artery dissection.
- To determine the temporal profile of recanalization using Doppler sonography.
Main Methods:
- Follow-up of 48 patients with 50 internal carotid artery dissections using sequential duplex Doppler studies.
- Assessment of sonographic features, frequency, and time course of resolution over up to 2 years.
Main Results:
- Doppler sonography detected abnormalities in all patients, with 68% showing a characteristic bidirectional high-resistance signal.
- Gradual recanalization occurred in 68% of dissections, averaging 51 days.
- Doppler flow patterns correlated with dissection development and recanalization.
Conclusions:
- Doppler sonography enables early detection of internal carotid artery dissection.
- Ultrasound monitoring facilitates tracking of dissection resolution.
- Findings can inform clinical management strategies for internal carotid artery dissection.
Background And Purpose:
Internal carotid artery dissection has increasingly been reported as a cause of transient ischemic attack or stroke. However, scarce data exist on the natural history of the arterial lesions and the temporal profile of recanalization.
Methods:
We followed 48 patients with 50 angiographically confirmed internal carotid artery dissections by sequential duplex Doppler studies in 2- to 4-day intervals during the first weeks after the onset of symptoms and after 4 weeks in 1- to 2-month intervals for up to 2 years. We assessed sonographic features as well as the frequency and time course of resolution.
Results:
Initial Doppler findings were abnormal in all patients, most of whom (68%) presented with a characteristic bidirectional high-resistance Doppler signal in the internal carotid artery. Gradual recanalization was found in 68% of the dissections after an average interval of 51 days. Changes of Doppler flow patterns in follow-up studies and features of intra-arterial angiography correlated with the development of internal carotid artery dissection and mirrored the recanalization process.
Conclusions:
Our findings suggest that Doppler sonography provides early recognition of internal carotid artery dissection and monitoring of its resolution. Thus, ultrasound studies may guide clinical decisions according to the development of the dissection.