CHAPTER Four CERE
CHAPTER Four CERE
ischemic Stroke Pathophysiologic Basis for Imag Imaging Triage for Emergency St Intervention Hemorrhagic Transformation of I Use of Contrast in Ischemic Stro Pattern Recognition in Ischemic Anterior (Carotid) Circulation Posterior (Vertebrobasilar) Circul
Stroke is a clinical term applied to any abr brain insult-literally "a blow from an unse are caused by either brain infarction (seventy-five percent), and must be distinguished from causing abrupt neurologic deficits. Infarcti injury which occurs when tissue perfusion enough to cause necrosis, typically due to feeding artery. Transient ischemic attacks cally defined as transient neurologic sympto less than twenty-four hours, which may serve as a "w infarction occurring in the next few weeks are often due to temporary occlusion of a fe though signs and symptoms may be transien considered to have had a stroke if imaging lesion. Hemorrhage is seen when blood rup arterial wall, spilling into the surrounding arachnoid space, or ventricles.
Stroke is the third leading cause of de States and major source of long-term disabi vors. The approach to treatment of ischemi largely preventative or supportive in the p of intravenous (IV) thrombolysis for acute s outcome benefits of endovascular devices imaging and intervention a critical part of str The patient with hemorrhage may harbor a cular malformation, or other condition, eac ant differences in treatment options. The ra critical role in the triage and evaluation of a Selection of the proper imaging protocol, red ischemic changes, differentiation of stroke disorders, and recognition of important str have a significant impact on therapy and out
This chapter reviews the pathophysiology time course of findings on computed tomo netic resonance imaging, patterns of arte occlusions, and overall radiologic approach the stroke patient.
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