0

<< Cervical Artery Dissection: Early Recognition and Stroke Prevention (Stroke CME, Trauma CME and Pharmacology CME)

Etiology And Pathophysiology

Arterial dissections occur when there is a tear in the innermost intimal lining of the vessel wall, causing disruption of the endothelium and the internal elastic lamina. Bleeding can then propagate between the layers, forming a pseudolumen. As bleeding continues, the intramural hematoma can enlarge within the pseudolumen, leading to occlusion of the vessel, thrombus formation and embolus, pseudoaneurysm, or rupture. (See Figure 1.) Unlike the extracranial arteries, the intracranial arteries have thinner outer layers and lack an external elastic lamina. Therefore, if the dissection extends intracranially, it can more easily lead to formation of a pseudoaneurysm or rupture, causing a subarachnoid hemorrhage.

To continue reading, please log in or purchase access.

Already purchased this course?
Log in to read.
Purchase a subscription

Price: $449/year

140+ Credits!

Money-back Guarantee
Get Quick-Read Evidence-Based Updates
Enter your email to get free evidence-based content delivered to your inbox once per month.
Please provide a valid email address.