How are the etiologies of hemorrhagic stroke categorized?

Updated: Apr 22, 2019
  • Author: David S Liebeskind, MD, FAAN, FAHA, FANA; Chief Editor: Andrew K Chang, MD, MS  more...
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The etiologies of stroke are varied, but they can be broadly categorized into ischemic or hemorrhagic. Approximately 80-87% of strokes are from ischemic infarction caused by thrombotic or embolic cerebrovascular occlusion. Intracerebral hemorrhages account for most of the remainder of strokes, with a smaller number resulting from aneurysmal subarachnoid hemorrhage. [5, 6, 7, 8]

In 20-40% of patients with ischemic infarction, hemorrhagic transformation may occur within 1 week after ictus. [9, 10]

Differentiating between the different types of stroke is an essential part of the initial workup of patients with stroke, as the subsequent management of each disorder will be vastly different.

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