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Bleeding and subsequent anemia: a precipitant for cerebral infarction
1Department of Neurology, University of Ulsan, Asan Medical Center, Seoul, South Korea. jongskim@www.amc.seoul.kr
European Neurology
|June 1, 2000
Summary
Bleeding and subsequent anemia (BSA) may trigger ischemic stroke, particularly large vessel infarction (LVI). This study investigated stroke characteristics in patients with BSA, finding LVI more common than in controls.
Area of Science:
- Neurology
- Hematology
- Vascular Medicine
Background:
- The link between bleeding and subsequent anemia (BSA) and stroke occurrence is understudied.
- Understanding BSA's role in stroke is crucial for diagnosis and treatment.
Purpose of the Study:
- To characterize strokes associated with BSA.
- To compare stroke subtypes in BSA patients versus controls.
Main Methods:
- Retrospective study of 16 acute stroke patients with anemia (hemoglobin <= 9.0 g/dl).
- Comparison of stroke subtypes and risk factors with 32 control subjects.
- Vascular imaging (CTA/MRA) performed on 11 patients.
Main Results:
- Anemia causes included upper GI bleeding (11/16), hemorrhoids (2/16), and others.
- All patients had ischemic strokes (infarcts), predominantly in the middle cerebral artery (MCA) territory.
- Significant stenosis/occlusion of internal carotid artery (ICA) or MCA observed in 11/11 patients.
- Large vessel infarction (LVI) was significantly more frequent in BSA patients (p<0.05).
Conclusions:
- BSA may precipitate atherothrombotic cerebral infarction.
- Predominance of LVI in BSA-associated stroke suggests a link.
- Potential mechanisms include hemodynamic alterations or enhanced thrombosis.