Correlation of change in H2 concentration (△H2) haemodynamics or laboratory parameters. Correlation of change in H2 concentration (△H2) haemodynamics or laboratory parameters. (A) ΔH2 was positively correlated with cardiac index (CI; r=0.285, p=0.003). (B) ΔH2 was negatively correlated with high-sensitivity troponin T (hsTnT; r =−0.324, p=0.001). (C) ΔH2 was negatively correlated with C-reactive protein (CRP; r=−0.240, p=0.012). Atsushi Shibata et al. Open Heart 2018;5:e000814 ©2018 by British Cardiovascular Society