S100B and atrial fibrillation: Due to traumatic brain injury in SAH, S100B concentrations were highly elevated in SAH patients (median: 768.70 pg/mL), followed by AF patients (median: 191.00 pg/mL, p = 0.18) and SZ patients (median: 93.87 pg/mL, p = 0.02) (Figure 1F).