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Related Concept Videos

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...
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...
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...
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...

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Permanent Cerebral Vessel Occlusion via Double Ligature and Transection
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Narrative review: reversible cerebral vasoconstriction syndromes.

Leonard H Calabrese1, David W Dodick, Todd J Schwedt

  • 1Cleveland Clinic Lerner College of Medicine of Case Western Reserve University and Cleveland Clinic Foundation, Cleveland, Ohio 44195, USA. Calabrl@ccf.org

Annals of Internal Medicine
|January 4, 2007
PubMed
Summary

Reversible cerebral vasoconstriction syndromes (RCVS) cause sudden, severe headaches due to narrowed brain arteries. This condition is typically self-limited, resolving within weeks.

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Area of Science:

  • Neurology
  • Vascular Neurology

Background:

  • Reversible cerebral vasoconstriction syndromes (RCVS) are a group of conditions characterized by reversible multifocal narrowing of cerebral arteries.
  • RCVS often presents with sudden, severe thunderclap headaches and can affect younger individuals, posing risks of ischemic or hemorrhagic stroke.

Purpose of the Study:

  • To review the current understanding of RCVS.
  • To summarize key clinical, laboratory, and imaging features of RCVS.
  • To discuss diagnostic and treatment strategies for RCVS.

Main Methods:

  • Literature review of RCVS.
  • Analysis of clinical presentations, laboratory findings, and imaging characteristics.
  • Discussion of diagnostic evaluation and management approaches.

Main Results:

  • RCVS is defined by reversible multifocal cerebral artery narrowing, often presenting as thunderclap headache.
  • Differential diagnosis includes conditions with similar presentations but different prognoses, such as primary cerebral vasculitis and subarachnoid hemorrhage.
  • RCVS is typically self-limited, with resolution of symptoms and vasoconstriction over days to weeks.

Conclusions:

  • RCVS is a distinct clinical entity that requires accurate diagnosis to differentiate from more severe conditions.
  • Understanding the characteristic features and natural history of RCVS is crucial for appropriate management.
  • Prompt diagnosis and management can prevent complications associated with RCVS.