At days 3–5, Iba1 AF (%) increased significantly in comparison with controls (P < 0.01) and was nine times higher in subjects dying between 5 and 12 days post‐ICH (P < 0.001; ICH: 20.92 ± 0.1.7% vs. controls: 2.4 ± 0.2%). This evidence concerns the gene AIF1 and atrial fibrillation.