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Related Concept Videos

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...
Cerebral Edema ll: Pathophysiology01:22

Cerebral Edema ll: Pathophysiology

Vasogenic edema is a major form of cerebral edema characterized by abnormal accumulation of fluid in the brain’s extracellular space due to disruption of the blood–brain barrier (BBB). The BBB is a specialized structure composed of endothelial cells connected by tight junctions, supported by astrocytic endfeet and a basement membrane. Under normal conditions, it tightly regulates the movement of ions, proteins, and solutes between the bloodstream and brain parenchyma. When this barrier loses...
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...
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...

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Related Experiment Video

Updated: May 21, 2026

Permanent Cerebral Vessel Occlusion via Double Ligature and Transection
08:22

Permanent Cerebral Vessel Occlusion via Double Ligature and Transection

Published on: July 21, 2013

[Reversible cerebral vasoconstriction syndrome].

A Néel1, B Guillon, E Auffray-Calvier

  • 1Service de Médecine Interne, CHU Hôtel-Dieu, 1, place Alexis-Ricordeau, 44093 Nantes cedex, France. antoine.neel@univ-nantes.fr

La Revue De Medecine Interne
|June 26, 2012
PubMed
Summary
This summary is machine-generated.

Reversible cerebral vasoconstriction syndrome (RCVS) is a transient cerebrovascular disorder often mistaken for vasculitis. Prompt recognition of RCVS symptoms like thunderclap headaches is crucial for appropriate management and avoiding complications.

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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
  • Vascular Neurology
  • Neuroimaging

Context:

  • Reversible cerebral vasoconstriction syndrome (RCVS) is an under-recognized cerebrovascular condition.
  • Previously misdiagnosed as central nervous system vasculitis, RCVS is now understood to involve acute cerebral artery vasospasm.
  • RCVS can be triggered by postpartum states or vasoactive drugs, but also occurs spontaneously.

Purpose:

  • To delineate the characteristic clinical and radiological presentation of RCVS.
  • To highlight key diagnostic features, including thunderclap headaches and characteristic angiography findings.
  • To emphasize the importance of prompt RCVS recognition for appropriate patient management.

Summary:

  • RCVS typically affects individuals aged 40-45, with a female predominance.
  • Clinical presentation includes recurrent thunderclap headaches, potentially with focal deficits or seizures; imaging may show complications like subarachnoid hemorrhage.
  • Cerebral angiography reveals multifocal arterial narrowing ('string and bead' appearance), with spontaneous resolution of vasoconstriction within 1-3 months.

Impact:

  • Early identification of RCVS prevents unnecessary investigations and aggressive treatments.
  • Recognition facilitates the search for and management of triggering factors.
  • Further research is needed to clarify drug-induced RCVS and develop clinical trials to prevent strokes associated with this condition.