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Updated: Jul 6, 2026

A Thrombotic Stroke Model Based On Transient Cerebral Hypoxia-ischemia
Published on: August 18, 2015
[Thromboprophylaxis for cerebrovascular disorders: acetylsalicylic acid remains the cornerstone]
1Academisch Medisch Centrum/Universiteit van Amsterdam, afd. Inwendige Geneeskunde, onderafd. Vasculaire Geneeskunde, F-4, Meibergdreef 9, 1105 AZ Amsterdam. m.m.levi@amc.uva.nl
Insights
Acetylsalicylic acid effectively prevents vascular events. For high-risk patients, vitamin K antagonists offer no additional benefit due to increased bleeding risks, while aspirin plus dipyridamole shows modest stroke prevention gains.
Area of Science:
- Cardiovascular Medicine
- Neurology
- Pharmacology
Background:
- Antithrombotic medications are crucial for managing and preventing atherothrombotic diseases.
- Acetylsalicylic acid is a well-established treatment for reducing recurrent vascular events like myocardial infarction and ischemic stroke.
Discussion:
- Vitamin K antagonists demonstrated superiority over acetylsalicylic acid in high-risk coronary atherothrombosis patients.
- However, major bleeding, including intracerebral hemorrhage, negated the benefits of vitamin K antagonists in major trials (SPIRIT, ESPRIT).
Key Insights:
- Acetylsalicylic acid (aspirin) is effective for secondary prevention of atherothrombotic events.
- Vitamin K antagonists do not offer superior outcomes compared to placebo when accounting for increased bleeding risk.
- Combining acetylsalicylic acid with dipyridamole showed a modest improvement in preventing recurrent ischemic stroke compared to aspirin alone.
Outlook:
- Further research may explore optimized antithrombotic strategies balancing efficacy and safety.
- Individualized treatment approaches considering patient risk factors for both thrombosis and bleeding are warranted.
- Investigating novel antithrombotic agents with improved safety profiles remains a priority.
Abstract:
Antithrombotic medication plays a key role in the treatmentand secondary prophylaxis of atherothrombotic conditions. Numerous studies have found that acetylsalicylic acid is effective in reducing the incidence of (recurrent) acute vascular events, such as myocardial infarction or ischaemic stroke. For coronary atherothrombosis, anticoagulation with vitamin K antagonists was shown to be slightly superior to acetylsalicylic acid in high-risk patients. Two major trials, the 'Stroke prevention in reversible ischemia trial' (SPIRIT) and the 'European/Australasian stroke prevention in reversible ischaemia trial' (ESPRIT), showed that vitamin K antagonists were more effective than placebo in the prevention of ischaemic stroke, but the favourable effect was completely offset by a higher incidence of major bleeding (including intracerebral bleeding) in patients using vitamin K antagonists. In the ESPRIT trial, the combination of acetylsalicylic acid and dipyridamole provided a modest benefit over acetylsalicylic acid alone in the prevention of (recurrent) ischaemic stroke.
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