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Ischemic Stroke l: Introduction01:15

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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.
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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...
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What Lies behind the Ischemic Stroke: Aortic Dissection?

Turgut Deniz1, Ersel Dag2, Murat Tulmac3

  • 1Department of Emergency Medicine, Faculty of Medicine, Kirikkale University, 71350 Kirikkale, Turkey.

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Aortic dissection (AD) can mimic stroke symptoms like vertigo and loss of consciousness. Early diagnosis of AD involving carotid arteries is crucial for appropriate surgical intervention, not fibrinolytic treatment.

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Area of Science:

  • Cardiology
  • Neurology
  • Radiology

Background:

  • Aortic dissection (AD) can present with atypical symptoms beyond chest pain, including neurological deficits.
  • Carotid artery involvement in AD can lead to diverse clinical manifestations, such as stroke or headache.

Purpose of the Study:

  • To highlight the importance of considering aortic dissection in patients presenting with neurological symptoms.
  • To emphasize the diagnostic challenges and management implications of AD involving the carotid arteries.

Main Methods:

  • A case report of a 71-year-old woman presenting with vertigo and altered consciousness.
  • Diagnostic workup included diffusion-weighted MRI of the brain, echocardiography, and CT angiography.
  • Initial treatment plan for fibrinolysis was altered upon diagnosis of aortic dissection.

Main Results:

  • Brain MRI revealed acute cerebral ischemia.
  • CT angiography confirmed aortic dissection extending from the aortic arch to the common carotid arteries.
  • Surgical intervention was deemed necessary after diagnosis.

Conclusions:

  • Aortic dissection should be considered in emergency department presentations of altered consciousness and stroke, especially when carotid artery involvement is suspected.
  • Inadequate patient history (anamnesis) can obscure the diagnosis of AD.
  • Prompt and accurate diagnosis is critical for appropriate treatment strategy, differentiating between medical and surgical management.