Indexes of left ventricular function in WT animals. Heart rate [in beats/min (bpm)], left ventricular maximum pressure (LVPmax), stroke volume, maximum rate of change in left ventricular pressure (dP/dtmax), cardiac output, and diastolic relaxation time constant (τ) are displayed at BL before arrest and at 120 min (R120) and 240 min (R240) post-ROSC. *P < 0.05, significant difference relative to BL. P < 0.05 (denoted by bracket), significant difference between treatment groups.