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Related Concept Videos

Ischemic Stroke l: Introduction01:15

Ischemic Stroke l: Introduction

44
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.
44
Ischemic Stroke ll: Pathophysiology01:15

Ischemic Stroke ll: Pathophysiology

54
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...
54
Aneurysm II: Clinical Manifestations and Diagnostic Studies01:21

Aneurysm II: Clinical Manifestations and Diagnostic Studies

589
Thoracic, aortic arch and abdominal aneurysms are significant vascular conditions that can present with various clinical manifestations and lead to serious complications. Understanding these manifestations and the appropriate diagnostic studies is essential for effective management and treatment.Thoracic Aortic AneurysmsThoracic aortic aneurysms often remain asymptomatic until they reach a size that impinges on adjacent structures. They typically cause deep, diffuse chest pain that radiates to...
589
Transient Ischemic Attack l: Introduction01:26

Transient Ischemic Attack l: Introduction

18
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...
18
Hemorrhagic Stroke ll: Pathophysiology01:29

Hemorrhagic Stroke ll: Pathophysiology

30
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...
30
Stroke: Introduction and Types01:29

Stroke: Introduction and Types

55
A stroke is an acute neurological event caused by the sudden disruption of cerebral blood flow, leading to rapid loss of neuronal function. Neurons depend on continuous oxygen and glucose supply, so even brief interruptions can cause irreversible injury within minutes. Strokes are classified into ischemic and hemorrhagic types.Ischemic StrokeIschemic strokes are most common and occur due to arterial occlusion, depriving brain tissue of oxygen and nutrients. This leads to energy failure, ionic...
55

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Related Experiment Video

Updated: May 4, 2026

The Stroke Preclinical Assessment Network Multi-Laboratory Model of Thromboembolic Stroke with Thrombolysis: TE-MCAo
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The Stroke Preclinical Assessment Network Multi-Laboratory Model of Thromboembolic Stroke with Thrombolysis: TE-MCAo

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Cryptogenic stroke-the appropriate diagnostic evaluation.

Hardik Amin1, David M Greer

  • 1Yale New Haven Hospital, LCI Building, 10th floor, 15 York Street, New Haven, CT, 06520, USA.

Current Treatment Options in Cardiovascular Medicine
|December 20, 2013
PubMed
Summary
This summary is machine-generated.

Cryptogenic stroke, a stroke without a clear cause after thorough evaluation, presents diagnostic challenges. Understanding its epidemiology and diagnostic work-up is crucial for managing recurrence risk.

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Area of Science:

  • Neurology
  • Cardiology
  • Vascular Medicine

Background:

  • Ischemic strokes are a major cause of death and disability in the US.
  • Etiologies include large artery atherosclerosis, small vessel occlusion, and cardioembolism.
  • Cryptogenic stroke is diagnosed by exclusion after a comprehensive work-up.

Purpose of the Study:

  • To define cryptogenic stroke and its epidemiology.
  • To outline recommended diagnostic evaluations.
  • To discuss the prognosis and recurrence risks.

Main Methods:

  • Review of existing literature on stroke etiology and diagnosis.
  • Analysis of diagnostic challenges in identifying stroke causes.
  • Examination of outcomes associated with cryptogenic stroke.

Main Results:

  • Cryptogenic stroke is a diagnosis of exclusion, requiring a thorough work-up.
  • Diagnostic challenges include transient events and unclear cardiac findings.
  • Recurrence risk and prognosis vary based on underlying, often occult, causes.

Conclusions:

  • Cryptogenic stroke is a heterogeneous condition requiring careful diagnostic consideration.
  • A systematic approach to evaluation is essential.
  • Understanding specific etiologies informs prognosis and recurrence risk management.