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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.
Ischemic Heart Disease: Overview01:17

Ischemic Heart Disease: Overview

Ischemic heart disease occurs when the heart's blood supply dwindles, causing an ominous lack of oxygen and nutrients. This deficiency, stemming from reduced or obstructed blood flow, spells danger, leading to heart muscle damage and dysfunction.
Atherosclerosis, the primary malefactor, orchestrates this dangerous condition. It manifests as the accumulation of fatty deposits, akin to insidious plaques, within arterial walls. As time elapses, these plaques metamorphose, hardening and narrowing...
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...
Decreased Body Temperature01:29

Decreased Body Temperature

A decreased body temperature can occur in patients with hypothermia and frostbite. Heat loss with extended cold exposure overpowers the body's ability to create heat, resulting in hypothermia. Core temperature readings help classify hypothermia. Mild hypothermia is temperatures between 32 °C (89.6 °F) and 35°C (95 °F) and is caused by impaired thermoregulation. Moderate hypothermia is temperatures between 28 C (82.4 °F) and 32 °C (89.6 °F) caused by sustained extreme cold exposure, and severe...
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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Short-Duration Hypothermia Induction in Rats using Models for Studies examining Clinical Relevance and Mechanisms
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Influence of temperature on ischemic brain: basic and clinical principles.

Francisco Campos1, Miguel Blanco, David Barral

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Summary

Maintaining a body temperature between 35.5-36.5°C may optimize outcomes for stroke patients. While hyperthermia treatment shows promise, further clinical studies are needed to confirm hypothermia

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Area of Science:

  • Neurology
  • Thermoregulation
  • Ischemic Stroke Pathogenesis

Background:

  • Interest in body temperature's effect on stroke outcome has resurged.
  • Animal models have elucidated pathogenic mechanisms, requiring human clinical confirmation.
  • Hyperthermia and hypothermia's roles in ischemic stroke are under investigation.

Purpose of the Study:

  • To review the effects and pathogenesis of hyperthermia and hypothermia in ischemic stroke.
  • To evaluate the efficacy and safety of anti-hyperthermic and hypothermic treatments.
  • To determine optimal therapeutic body temperature targets for stroke patients.

Main Methods:

  • Literature review of animal models and clinical studies on thermoregulation and ischemic stroke.
  • Analysis of pathogenic mechanisms related to hyperthermia and hypothermia.
  • Synthesis of evidence regarding the benefits and risks of temperature modulation therapies.

Main Results:

  • Hyperthermia treatment in stroke patients improves comfort and outcomes short and long-term.
  • Definitive clinical evidence for hypothermia's benefits in brain ischemia is currently lacking.
  • An optimal therapeutic target body temperature range of 35.5–36.5 °C is suggested.

Conclusions:

  • Treatment of hyperthermia in ischemic stroke patients shows positive effects, but requires further clinical validation.
  • Hypothermia's therapeutic benefits for brain ischemia lack conclusive clinical proof despite theoretical support.
  • Maintaining normothermia within 35.5–36.5 °C is a potential optimal target for stroke patients.