Cardiac physiological measurements, taken at baseline 10 min before cardiac arrest, and then at 10 min intervals during protocol including (A) peak left ventricular pressures (LVPmax); (B) dP/dtmax, a measure of contractility; (C) cardiac output, and (D) the isovolumic relaxation time constant, tau. Statistically significant differences between both hypothermia groups and controls (*) and between EIH and DIH groups (¥) are denoted for p < 0.05.