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Related Concept Videos

Ischemic Stroke ll: Pathophysiology01:15

Ischemic Stroke ll: Pathophysiology

5
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...
5
Ischemic Stroke l: Introduction01:15

Ischemic Stroke l: Introduction

7
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.
7
Regulation of Stroke Volume01:27

Regulation of Stroke Volume

8.2K
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...
8.2K
Hemorrhagic Stroke l: Introduction01:17

Hemorrhagic Stroke l: Introduction

4
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...
4
Hemorrhagic Stroke ll: Pathophysiology01:29

Hemorrhagic Stroke ll: Pathophysiology

6
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...
6
Transient Ischemic Attack l: Introduction01:26

Transient Ischemic Attack l: Introduction

2
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...
2

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Related Experiment Video

Updated: Apr 19, 2026

Optimized Management of Endovascular Treatment for Acute Ischemic Stroke
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Optimized Management of Endovascular Treatment for Acute Ischemic Stroke

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Flow Augmentation in Acute Ischemic Stroke.

Golnaz Yadollahikhales1, Afshin Borhani-Haghighi2, Mohammad Torabi-Nami3

  • 1Clinical Neurology Research Center, Shiraz University of Medical Sciences, Shiraz, Fars, Iran.

Clinical and Applied Thrombosis/Hemostasis : Official Journal of the International Academy of Clinical and Applied Thrombosis/Hemostasis
|December 6, 2014
PubMed
Summary
This summary is machine-generated.

New therapeutic strategies are needed for acute ischemic stroke. This review examines methods to improve cerebral blood flow and provide neuroprotection, addressing limitations of current treatments.

Keywords:
cerebral blood flowcerebrovascular accidentextracranial–intracranial carotid bypass surgeryinduced hypertensionintra-aortic balloon counterpulsationischemic strokeneuroprotectionpartial aortic occlusionsphenopalatine ganglion stimulationtranscranial laser therapy

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Area of Science:

  • Neuroscience
  • Cardiovascular Medicine
  • Emergency Medicine

Background:

  • Acute ischemic stroke (AIS) poses significant challenges due to limited therapeutic options.
  • Current treatments for AIS have major pitfalls and unmet needs.
  • Understanding cerebral blood flow dynamics is crucial for developing new AIS therapies.

Purpose of the Study:

  • To review the role of cerebral blood flow, collaterals, vasoreactivity, and reperfusion injury in AIS.
  • To examine pharmacological and interventional measures for flow augmentation and neuroprotection in AIS.

Main Methods:

  • Literature review of existing studies on AIS pathophysiology.
  • Analysis of pharmacological interventions (e.g., volume expansion, induced hypertension).
  • Evaluation of interventional strategies (e.g., bypass surgery, laser therapy, nerve stimulation).

Main Results:

  • Cerebral blood flow, collaterals, vasoreactivity, and reperfusion injury are key factors in AIS.
  • Various pharmacological and interventional approaches show potential for flow augmentation.
  • These methods aim to enhance neuroprotection in the context of AIS.

Conclusions:

  • There is an urgent need for novel therapeutic options for AIS.
  • Pharmacological and interventional strategies targeting cerebral blood flow offer promising avenues.
  • Further research is needed to optimize these approaches for improved AIS outcomes.