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Spontaneous and endothelial-independent vasodilation are impaired in patients with spontaneous carotid dissection: a
Ralf W Baumgartner1, Barbara Lienhardt, Maria Mosso
1Department of Neurology, University Hospital Zürich, Switzerland. ralf.baumgartner@usz.ch
Insights
Patients with carotid artery dissection show reduced blood vessel dilation. This suggests impaired vasodilation may predispose individuals to spontaneous carotid artery dissection.
Area of Science:
- Vascular Biology
- Neurology
- Radiology
Background:
- Spontaneous dissection of the cervical internal carotid artery is a significant cause of stroke.
- The underlying mechanisms predisposing to this condition remain incompletely understood.
Purpose of the Study:
- To investigate spontaneous and endothelium-independent vasodilation in patients with unilateral spontaneous carotid artery dissection.
- To compare arterial dilation in patients and healthy controls using high-resolution ultrasound.
Main Methods:
- A case-control study involving 27 patients with unilateral spontaneous cervical internal carotid artery dissection and 27 matched healthy controls.
- Assessment of absolute and relative spontaneous and nitroglycerin-mediated dilation in carotid and brachial arteries.
- High-resolution ultrasound was employed for arterial measurements.
Main Results:
- Patients exhibited significantly lower spontaneous and endothelial-independent dilation in carotid arteries compared to controls.
- No significant difference in brachial artery dilation was observed between patients and controls.
- These findings highlight impaired carotid artery vasodilation in individuals with dissection.
Conclusions:
- Abnormalities in vasodilation may represent a predisposing factor for spontaneous cervical internal carotid artery dissection.
- Further research into vascular function could elucidate risks for dissection and inform preventative strategies.
Background And Purpose:
We undertook this case-control study in patients with unilateral spontaneous dissection of the cervical internal carotid artery to investigate spontaneous and endothelium-independent dilation of the nondissected, contralateral carotid arteries and the ipsilateral brachial artery using high-resolution ultrasound.
Methods:
Spontaneous and endothelial-independent (nitroglycerin-mediated) absolute and relative dilation were assessed in the internal and common carotid and brachial arteries of 27 patients with unilateral spontaneous dissection of the cervical internal carotid artery and 27 age- and sex-matched healthy controls.
Results:
Absolute and relative spontaneous and endothelial-independent dilation of the carotid, but not brachial arteries, were significantly lower in patients as compared with controls.
Conclusions:
Vasodilation abnormalities may be a predisposing factor for spontaneous dissection of the cervical internal carotid artery.
