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Figure 4 Correlations between left ventricular (LV) and brain flows, and coronary perfusion pressure (CPP), for AutoPulse cardiopulmonary resuscitation (A-CPR) and conventional (piston) cardiopulmonary resuscitation (C-CPR). For both the LV and brain, A-CPR produced more flow at given levels of CPP than C-CPR (p < 0.05).