NPPB and intracranial hemorrhage: BNP concentrations were significantly increased in patients with acute cerebral infarction (WMD = 163.30, 95% CI = 69.69–256.92, p = 0.0006, I2 = 90%, p-value of heterogeneity <0.0001); however, no significant difference was found in the brain hemorrhage group (WMD = 19.03, 95% CI = −8.51–46.57, p = 0.18, I2 = 97%, p-value of heterogeneity <0.00001) (Figure 3).