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Related Concept Videos

Hemorrhagic Stroke ll: Pathophysiology01:29

Hemorrhagic Stroke ll: Pathophysiology

A hemorrhagic stroke develops when a cerebral blood vessel ruptures, allowing blood to escape into the surrounding brain tissue, as in intracerebral hemorrhage (ICH), or into the subarachnoid space, as in subarachnoid hemorrhage (SAH). Because the skull is a rigid compartment, the sudden presence of extravascular blood rapidly increases intracranial pressure and compresses adjacent neural structures, leading to immediate tissue injury and impaired cerebral perfusion.Mass Effect and Primary...
Hemorrhagic Stroke l: Introduction01:17

Hemorrhagic Stroke l: Introduction

A hemorrhagic stroke is an acute neurological event that occurs when a weakened cerebral blood vessel ruptures, allowing blood to accumulate within or around the brain. The sudden release of blood forms a focal hematoma that increases intracranial pressure, displaces neural tissue, and can obstruct cerebrospinal fluid pathways. These effects may be compounded by intraventricular extension of the hemorrhage, cerebral edema, or compression of adjacent structures, all of which contribute to...
Stroke: Introduction and Types01:29

Stroke: Introduction and Types

A stroke is an acute neurological event caused by the sudden disruption of cerebral blood flow, leading to rapid loss of neuronal function. Neurons depend on continuous oxygen and glucose supply, so even brief interruptions can cause irreversible injury within minutes. Strokes are classified into ischemic and hemorrhagic types.Ischemic StrokeIschemic strokes are most common and occur due to arterial occlusion, depriving brain tissue of oxygen and nutrients. This leads to energy failure, ionic...
Ischemic Stroke l: Introduction01:15

Ischemic Stroke l: Introduction

Ischemic stroke is an acute cerebrovascular condition in which blood flow to a brain region is suddenly interrupted, leading to tissue infarction. Neurons depend on continuous oxygen and glucose supply, so even brief reductions in perfusion cause energy failure, ionic imbalance, and irreversible injury. Ischemic strokes are classified into thrombotic and embolic types based on their underlying mechanisms.Thrombotic MechanismsThrombotic stroke develops when a clot forms within a cerebral artery.
Ischemic Stroke ll: Pathophysiology01:15

Ischemic Stroke ll: Pathophysiology

An ischemic stroke occurs when a cerebral blood vessel becomes obstructed, most often by a thrombus or embolus, interrupting the delivery of oxygen and glucose to brain tissue. Because neurons rely on continuous aerobic metabolism, energy failure begins within minutes of reduced perfusion. The region receiving the least blood flow becomes the infarct core, an area of irreversible cellular death. Surrounding this core lies the penumbra, a zone of hypoperfused but still viable tissue that is...
Transient Ischemic Attack l: Introduction01:26

Transient Ischemic Attack l: Introduction

A transient ischemic attack (TIA) is a brief episode of neurological dysfunction caused by a temporary, focal reduction in cerebral blood flow. Although symptoms resemble those of an ischemic stroke, the interruption in perfusion is short-lived and does not cause permanent infarction. TIAs are clinically important because they often serve as early warning events for future stroke.Mechanisms of Transient Cerebral IschemiaTransient cerebral ischemia may arise through several mechanisms. One...

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Related Experiment Video

Updated: Jun 15, 2026

A Thrombotic Stroke Model Based On Transient Cerebral Hypoxia-ischemia
06:01

A Thrombotic Stroke Model Based On Transient Cerebral Hypoxia-ischemia

Published on: August 18, 2015

Stroke registry: hemorrhagic vs ischemic strokes.

Joseph R Shiber1, Emily Fontane, Ademola Adewale

  • 1University of Central Florida, Orlando, 32803, USA. shiberj@bellsouth.net

The American Journal of Emergency Medicine
|March 13, 2010
PubMed
Summary

Hemorrhagic stroke incidence appears higher than previously reported, with 41.9% of cases in a recent study. This may reflect improved diagnostics or increased use of blood-thinning medications.

Related Experiment Videos

Last Updated: Jun 15, 2026

A Thrombotic Stroke Model Based On Transient Cerebral Hypoxia-ischemia
06:01

A Thrombotic Stroke Model Based On Transient Cerebral Hypoxia-ischemia

Published on: August 18, 2015

Area of Science:

  • Neurology
  • Epidemiology
  • Public Health

Background:

  • Previous stroke studies (1970s-1980s) reported ischemic stroke at 73-86% and hemorrhagic stroke at 8-18%.
  • Anecdotal clinical observations suggested a higher proportion of hemorrhagic strokes than historical data indicated.

Purpose of the Study:

  • To compare the incidence of ischemic versus hemorrhagic stroke in a contemporary patient population.
  • To investigate potential reasons for observed discrepancies with historical stroke data.

Main Methods:

  • A retrospective review of all stroke patients discharged from a regional stroke center over one year.
  • Analysis of stroke type (ischemic vs. hemorrhagic) based on hospital records.

Main Results:

  • A total of 757 patients were included in the study.
  • Hemorrhagic strokes accounted for 41.9% of cases, while ischemic strokes comprised 58.1%.

Conclusions:

  • The observed percentage of hemorrhagic strokes was significantly higher than predicted by earlier epidemiologic studies.
  • Potential explanations include improved computed tomographic (CT) scan availability leading to better detection, or increased use of antiplatelet agents and warfarin.
  • Further research is warranted to elucidate the contributing factors to this shift in stroke type prevalence.