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Related Concept Videos

Transient Ischemic Attack l: Introduction01:26

Transient Ischemic Attack l: Introduction

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...
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Related Experiment Video

Updated: Jul 11, 2026

Advanced Diffusion Imaging in The Hippocampus of Rats with Mild Traumatic Brain Injury
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Diffusion-weighted MRI in evaluation of transient ischemic attack.

Junko Nagura1, Kazuo Suzuki, S Claiborne Johnston

  • 1Department of Social Medicine and Cultural Sciences, Kyoto Prefectural University of Medicine, Kyoto, Japan. nagura@basic.kpu-m.ac.jp

Journal of Stroke and Cerebrovascular Diseases : the Official Journal of National Stroke Association
|October 2, 2007
PubMed
Summary

Diffusion-weighted imaging (DWI) detects lesions in about a third of transient ischemic attack (TIA) patients. DWI abnormalities correlate with intracranial vascular occlusive lesions, aiding in diagnosis.

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Area of Science:

  • Neurology
  • Radiology
  • Vascular Medicine

Background:

  • Diffusion-weighted imaging (DWI) is crucial for identifying acute ischemic lesions in transient ischemic attacks (TIAs).
  • However, the clinical significance and interpretation of DWI findings in TIA patients remain debated.
  • Understanding the underlying pathophysiology of DWI abnormalities is essential for accurate diagnosis and management.

Purpose of the Study:

  • To investigate the prevalence and characteristics of DWI abnormalities in patients experiencing recent TIAs.
  • To correlate DWI findings with clinical manifestations and vascular lesion types.
  • To determine the utility of DWI in conjunction with magnetic resonance angiography (MRA) for diagnosing TIA subtypes.

Main Methods:

  • Analysis of 45 consecutive TIA patients undergoing DWI within 10 days of symptom onset.
  • Classification of clinical symptoms based on the Oxfordshire Community Stroke Study criteria (lacunar vs. non-lacunar syndromes).
  • Categorization of DWI abnormalities into small-vessel and large-vessel lesions based on vascular distribution; correlation with intracranial MRA findings.

Main Results:

  • DWI abnormalities were detected in 14 (31%) of 45 TIA patients.
  • DWI-positive patients were significantly more likely to have intracranial occlusive vascular lesions (50%) compared to DWI-negative patients (16%).
  • Classical lacunar syndromes were associated with small-vessel lesions in DWI-positive patients, while non-lacunar symptoms correlated with large-vessel lesions.

Conclusions:

  • DWI abnormalities, though present in only a third of TIA patients, are strongly associated with intracranial vascular occlusive disease.
  • Combining DWI with MRA enhances the detection of large-artery lesions, particularly in patients presenting with lacunar syndromes.
  • These findings underscore the importance of DWI in evaluating TIA pathophysiology and guiding treatment strategies.