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The duration of symptoms in transient ischemic attack
K Kimura1, K Minematsu, M Yasaka
1Department of Medicine, National Cardiovascular Center, Osaka, Suita, Japan.
Neurology
|April 2, 1999
Summary
Transient ischemic attacks (TIAs) lasting an hour or more are linked to more frequent cardiac and arterial diseases. Longer TIA duration warrants closer examination for these underlying conditions.
Area of Science:
- Neurology
- Cardiology
- Vascular Medicine
Background:
- Transient ischemic attacks (TIAs) are typically brief, lasting 2-15 minutes, but some can be prolonged.
- Understanding factors influencing TIA duration is crucial for clinical management.
Purpose of the Study:
- To investigate the relationship between TIA duration and clinical characteristics.
- To identify factors associated with prolonged TIA symptoms.
Main Methods:
- 81 patients with carotid TIAs underwent brain imaging, angiographic, and cardiac evaluations.
- Risk factors, cardiac sources of emboli, and arterial stenosis were assessed.
- Symptom duration was correlated with clinical data, including recent infarcts.
Main Results:
- Emboligenic cardiac or arterial diseases were significantly associated with TIA duration.
- Long-duration TIAs (≥60 minutes) were more frequent in patients with these diseases (86%) compared to short-duration TIAs (<60 minutes) (46%).
- Recent infarcts were also more common in patients with long-duration TIAs (45% vs. 21%).
Conclusions:
- TIA duration can effectively differentiate between short (<1 hour) and long (≥1 hour) events.
- Patients experiencing long-duration TIAs require more thorough investigation for cardiac and arterial diseases.