Fig. 4

MMIMS-MIGET measurements. Relative shunt volumes expressed in per cent of cardiac output (CO) as an indication for a ventilation/perfusion mismatch and circulatory bypass of pulmonary gas exchange (a) Ratio of low (b), normal (c) and high (d) V/Q units (% of CO) symbolising hyper-(hypo)ventilated lung areas with insufficient perfusion to effectively contribute to gas exchange. Animals in the mCCD2 group showed significantly more shunt (p = 0.025) and less normal V/Q (p = 0.017) during CPR. Differences in high and low V/Q were not statistically significant. Analysed animal numbers are reduced due to technical difficulties during the trial, effectively disabling the MIGET device for 2 experiments. (* = p < 0.05)