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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...
Regulation of Stroke Volume01:27

Regulation of Stroke Volume

The regulation of stroke volume, which is the amount of blood the heart pumps out during each heartbeat, is critical for maintaining a healthy circulatory system. Stroke volume is influenced by three main factors: preload, contractility, and afterload.
Preload refers to the degree of stretch on the heart before it contracts. It's analogous to the stretching of a rubber band; the more it's stretched, the more forcefully it snaps back. This concept is encapsulated in the Frank-Starling law of the...
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.
Peripheral Artery Disease III: Interprofessional Care01:27

Peripheral Artery Disease III: Interprofessional Care

Peripheral Artery Disease (PAD) is characterized by narrowed arteries that diminish blood flow to the extremities. Effective management of PAD requires an interprofessional approach involving various healthcare professionals. The critical aspects of interprofessional care for PAD patients focus on risk factor modification, drug therapy, exercise therapy, nutrition therapy, critical limb ischemia care, and interventional radiology and surgical procedures.The primary treatment goal for PAD...
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...
Peripheral Artery Disease I: Introduction01:30

Peripheral Artery Disease I: Introduction

Peripheral artery disease (PAD) predominantly results from atherosclerosis, which involves the accumulation of fatty deposits, or plaques, within the walls of arteries. This causes them to narrow and harden, significantly reducing blood flow. PAD predominantly affects the legs, particularly the arteries supplying the thighs and calves. In rare cases, it may involve other arteries, including those in the arms.Etiology of PAD:The principal cause of PAD is atherosclerosis, which results from fatty...

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Related Experiment Video

Updated: Jul 4, 2026

Real-Time Monitoring and Modulation of Blood Pressure in a Rabbit Model of Ischemic Stroke
09:00

Real-Time Monitoring and Modulation of Blood Pressure in a Rabbit Model of Ischemic Stroke

Published on: February 10, 2023

Is counterpulsation a potential therapy for ischemic stroke?

Jing Hao Han1, Ka Sing Wong

  • 1Department of Medicine and Therapeutics, Chinese University of Hong Kong, Hong Kong, China.

Cerebrovascular Diseases (Basel, Switzerland)
|June 19, 2008
PubMed
Summary

External counterpulsation (ECP) shows promise for improving outcomes in acute ischemic stroke patients by enhancing cerebral blood flow. Further large-scale randomized trials are needed to confirm its efficacy and safety in stroke management.

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A Thrombotic Stroke Model Based On Transient Cerebral Hypoxia-ischemia
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A Thrombotic Stroke Model Based On Transient Cerebral Hypoxia-ischemia

Published on: August 18, 2015

Related Experiment Videos

Last Updated: Jul 4, 2026

Real-Time Monitoring and Modulation of Blood Pressure in a Rabbit Model of Ischemic Stroke
09:00

Real-Time Monitoring and Modulation of Blood Pressure in a Rabbit Model of Ischemic Stroke

Published on: February 10, 2023

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
  • Cardiovascular Medicine
  • Biomedical Engineering

Background:

  • Effective acute stroke treatments beyond thrombolysis are limited.
  • Cerebral hypoperfusion is a significant factor in poor stroke outcomes.
  • There is a need for safe methods to increase cerebral blood flow.

Observation:

  • Preliminary studies suggest external counterpulsation (ECP) may improve clinical outcomes in stroke patients.
  • ECP may enhance blood supply to the brain, potentially benefiting ischemic stroke patients.

Findings:

  • Evidence suggests ECP could be a viable therapeutic option for acute ischemic stroke.
  • Current research is limited by a lack of well-designed clinical studies on ECP's effects.

Implications:

  • Large-scale, randomized controlled trials are necessary to establish ECP's efficacy and safety in acute stroke.
  • Future research should investigate the precise mechanisms and clinical value of ECP in ischemic stroke management.