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Statins for stroke prevention: disappointment and hope
Pierre Amarenco1, Andrew M Tonkin
1Department of Neurology and Stroke Center, Bichat University Hospital and Medical School, Denis Diderot University-Paris VII, 46 rue Henri Huchard, 75018 Paris, France. amarenco@ccr.jussieu.fr
Circulation
|June 17, 2004
Summary
Statins reduce stroke risk in patients with coronary heart disease (CHD), preventing 9 strokes per 1000 patients over 5 years. However, their benefit is not yet proven for the general population or preventing recurrent strokes.
Area of Science:
- Cardiovascular Medicine
- Neurology
- Pharmacology
Background:
- Stroke incidence rises with age, disproportionately affecting the elderly who also have higher coronary heart disease (CHD) risk.
- Cholesterol levels lack a clear association with all stroke causes in epidemiological studies.
- Long-term statin trials demonstrate reduced stroke incidence in patients with established or high-risk CHD.
Purpose of the Study:
- To evaluate the effectiveness of statins in reducing stroke incidence.
- To explore potential non-cholesterol-lowering mechanisms of statins' effect on stroke.
- To assess the role of global cardiovascular risk in treatment strategies.
Main Methods:
- Meta-analysis of 9 large, long-term statin trials involving 70,070 patients.
- Comparison of stroke risk reduction with statins versus antiplatelet agents.
- Review of existing epidemiological and observational data.
Main Results:
- Statins showed a 21% relative and 0.9% absolute risk reduction for stroke in CHD populations.
- 9 strokes per 1000 patients treated with statins for 5 years were prevented in CHD patients.
- Statins did not demonstrate stroke risk reduction in the general population or for preventing recurrent strokes.
Conclusions:
- Statins are effective in reducing stroke incidence in patients with established or high-risk CHD.
- Non-cholesterol-lowering effects may contribute to statins' cerebroprotective benefits.
- Treatment strategies focusing on global cardiovascular risk are recommended; further research in typical stroke populations is needed.
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