Inclusion Criteria- clinically defined lacunar syndrome 3 months before inclusion
- small deep infarct on diffusion MRI (Diffusion Weighted Imaging)
- no atherothrombotic, cardio-embolic, or other rarer cause.
Exclusion Criteria- patients with past coronary event
- contra-indication for assessment of vasomotor reactivity
- patients being on statin therapy at the time of brain infarction
- contra-indication for statin therapy
- patient still under statin therapy