What is the incidence of hemorrhagic stroke in the US?

Updated: Apr 22, 2019
  • Author: David S Liebeskind, MD, FAAN, FAHA, FANA; Chief Editor: Andrew K Chang, MD, MS  more...
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Answer

Each year in the United States, approximately 795,000 people experience new or recurrent stroke. Of these, approximately 610,000 represent initial attacks, and 185,000 represent recurrent strokes. Epidemiologic studies indicate that approximately 87% of strokes in the United States are ischemic, 10% are secondary to intracerebral hemorrhage, and another 3% may be secondary to subarachnoid hemorrhage. [5, 22]

A 2010 retrospective review from a stroke center found that 40.9% of the 757 patients in the study had suffered hemorrhagic strokes. [23] The researchers speculate that improved availability and implementation of computed tomography (CT) scanning may have unmasked a previous underestimation of the actual percentage of hemorrhagic strokes, or increased use of antiplatelet agents and warfarin may have led to a higher incidence of hemorrhage. Alternatively, this higher rate may represent referral bias of patients with intracerebral hemorrhages to medical centers with neurosurgical capabilities.


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