Related Experiment Video

Updated: May 9, 2026

Optimized System for Cerebral Perfusion Monitoring in the Rat Stroke Model of Intraluminal Middle Cerebral Artery Occlusion
12:15

Optimized System for Cerebral Perfusion Monitoring in the Rat Stroke Model of Intraluminal Middle Cerebral Artery Occlusion

Published on: February 17, 2013

Impaired perfusion modifies the relationship between blood pressure and stroke risk in major cerebral artery disease

Hiroshi Yamauchi1, Tatsuya Higashi, Shinya Kagawa

  • 1Division of PET Imaging, Shiga Medical Centre Research Institute, , Shiga, Japan.

Journal of Neurology, Neurosurgery, and Psychiatry
|August 13, 2013
PubMed

Insights

Lowering blood pressure (BP) may increase stroke risk in patients with cerebral artery disease and impaired perfusion. Impaired perfusion alters the BP-stroke risk relationship, highlighting the need for personalized treatment strategies.

Area of Science:

  • Neurology
  • Cardiovascular Medicine
  • Medical Imaging

Background:

  • Blood pressure (BP) management is crucial in patients with symptomatic cerebrovascular disease.
  • Impaired cerebral perfusion may alter the relationship between BP and stroke risk.

Purpose of the Study:

  • To investigate the interplay between BP, impaired cerebral perfusion, and stroke risk in patients with major cerebral artery disease.
  • To determine how impaired perfusion modifies the association between BP and stroke recurrence.

Main Methods:

  • Retrospective analysis of 130 medically treated patients with symptomatic carotid or middle cerebral artery disease.
  • Baseline hemodynamic assessment using (15)O-gas positron emission tomography.
  • Two-year follow-up for stroke recurrence or death.

Main Results:

  • A negative linear relationship was observed between systolic BP (SBP) and stroke risk in the affected arterial territory.
  • Normal SBP (<130 mm Hg) was associated with a higher 2-year ischemic stroke incidence compared to high SBP.
  • Normal SBP and impaired perfusion were independent predictors of stroke in the previously affected territory.
  • The relationship between SBP and total stroke recurrence was J-shaped, modified by perfusion status.

Conclusions:

  • Impaired cerebral perfusion significantly modifies the relationship between BP and stroke risk.
  • The findings suggest that BP targets for stroke prevention should be individualized based on perfusion status.
  • Limitations include retrospective design, potential sample bias, and limited event numbers.
Abstract

Keywords:
CEREBRAL BLOOD FLOWPETSTROKE

More Related Videos

Evaluation of Cerebral Blood Flow Autoregulation in the Rat Using Laser Doppler Flowmetry07:12

Evaluation of Cerebral Blood Flow Autoregulation in the Rat Using Laser Doppler Flowmetry

Published on: January 19, 2020

Performing Permanent Distal Middle Cerebral with Common Carotid Artery Occlusion in Aged Rats to Study Cortical Ischemia with Sustained Disability09:11

Performing Permanent Distal Middle Cerebral with Common Carotid Artery Occlusion in Aged Rats to Study Cortical Ischemia with Sustained Disability

Published on: February 23, 2016

Related Concept Videos

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...
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.
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...
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...
Arteries of the Head and Neck01:26

Arteries of the Head and Neck

The human body's intricate network of arteries ensures that every organ system receives the necessary oxygen and nutrients for optimal function. The arterial network in the head and neck region is particularly complex, providing vital blood flow to the brain, eyes, and other critical structures. Prominent arteries in this region include the internal carotid arteries and the vertebral arteries.
The internal carotid arteries supply blood to the anterior portion of the cerebrum. They enter the...