Related Experiment Video

Updated: Aug 14, 2026

A Mouse Model of Hemorrhagic Transformation Induced by Acute Hyperglycemia Combined with Transient Focal Ischemia
09:35

A Mouse Model of Hemorrhagic Transformation Induced by Acute Hyperglycemia Combined with Transient Focal Ischemia

Published on: November 15, 2024

Cerebral hyperperfusion syndrome

Walther N K A van Mook1, Roger J M W Rennenberg, Geert Willem Schurink

  • 1Department of Internal Medicine and Intensive Care, University Hospital Maastricht, Maastricht, Netherlands. wvm@sint.azm.nl

The Lancet. Neurology
|November 22, 2005
PubMed

Insights

Cerebral hyperperfusion syndrome (CHS) after carotid endarterectomy is a serious condition. Early recognition and treatment are crucial to prevent severe complications like brain edema and hemorrhage.

Area of Science:

  • Neurology
  • Vascular Surgery
  • Neurosurgery

Background:

  • Cerebral hyperperfusion syndrome (CHS) is a rare but serious complication following carotid endarterectomy.
  • CHS is characterized by headache, hypertension, seizures, and neurological deficits, potentially leading to severe outcomes like brain edema or hemorrhage.
  • Physician awareness of CHS and its management is limited, despite its significant morbidity and mortality.

Purpose of the Study:

  • To review the incidence, risk factors, pathogenesis, and treatment of cerebral hyperperfusion syndrome (CHS) after carotid endarterectomy.
  • To emphasize the importance of early diagnosis and intervention for CHS to prevent severe neurological complications.
  • To highlight the need for increased physician awareness and knowledge regarding CHS.

Main Methods:

  • Review of existing literature on cerebral hyperperfusion syndrome (CHS) post-carotid endarterectomy.
  • Analysis of reported incidences, clinical presentations, and risk factors associated with CHS.
  • Synthesis of current understanding regarding the pathophysiology and treatment strategies for CHS.

Main Results:

  • CHS occurs in 0-3% of patients after carotid endarterectomy, primarily in those with >100% increase in cerebral perfusion.
  • Key risk factors include diminished cerebrovascular reserve, postoperative hypertension, and prolonged hyperperfusion.
  • Impaired cerebral autoregulation due to endothelial dysfunction and free radical generation is implicated in CHS pathogenesis.

Conclusions:

  • Effective management of CHS involves regulating blood pressure and limiting cerebral perfusion increases.
  • While mild CHS cases may resolve completely, severe cases can lead to disability or death.
  • Enhanced physician knowledge and prompt treatment are essential to mitigate the severe consequences of CHS.

More Related Videos

Real-Time Monitoring of Neurocritical Patients with Diffuse Optical Spectroscopies07:12

Real-Time Monitoring of Neurocritical Patients with Diffuse Optical Spectroscopies

Published on: November 19, 2020

A Thrombotic Stroke Model Based On Transient Cerebral Hypoxia-ischemia06:01

A Thrombotic Stroke Model Based On Transient Cerebral Hypoxia-ischemia

Published on: August 18, 2015

Related Concept Videos

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...
Increased Intracranial Pressure ll: Pathophysiology01:29

Increased Intracranial Pressure ll: Pathophysiology

Increased intracranial pressure (ICP) refers to a potentially life-threatening rise in pressure inside the skull. This usually happens when there is a major change in the volume of brain tissue, blood, or cerebrospinal fluid (CSF) — the three components inside the skull. According to the Monro-Kellie doctrine, if the volume of one component increases, the volumes of the other components must decrease to maintain normal pressure. If this does not happen, ICP rises.The process often begins with...
Increased Intracranial Pressure l: Introduction01:14

Increased Intracranial Pressure l: Introduction

Intracranial hypertension is a sustained elevation of intracranial pressure (ICP) above 22 mm Hg. In supine adults, normal ICP is ~7–15 mm Hg.The rigid, nonexpandable cranium contains three components—brain tissue, blood, and cerebrospinal fluid (CSF)—that total ~1,700 mL in a typical adult: 1,400 mL brain (~80%), 150 mL blood (~10%), and 150 mL CSF (~10%). According to the Monro–Kellie doctrine, total intracranial volume is effectively fixed. When one component expands, CSF and venous blood...
Cytotoxic Edema: Pathophysiology01:21

Cytotoxic Edema: Pathophysiology

Cytotoxic edema is a form of cerebral edema characterized by intracellular swelling of neurons, astrocytes, and other glial cells. It develops when the mechanisms responsible for maintaining ionic gradients across the cell membrane become impaired. Under normal physiological conditions, the sodium–potassium ATPase actively transports sodium ions out of the cell and potassium ions into the cell, preserving osmotic balance and enabling electrical signaling. This pump requires a continuous supply...
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...
Cerebral Edema l: Introduction01:19

Cerebral Edema l: Introduction

Cerebral edema is a pathological increase in brain water content that disrupts intracranial pressure regulation and impairs neurological function. Because the cranial vault is rigid, even modest increases in tissue volume can compromise cerebral perfusion, distort neural structures, and initiate secondary injury. Cerebral edema develops through four principal mechanisms: vasogenic, cytotoxic, interstitial, and ionic.Vasogenic EdemaVasogenic edema arises from disruption of the blood–brain...