An example of a system for providing emergency care to a patient includes an automated chest compression device configured to engage the patient at the patient's sternum to provide multiple chest compression cycles to the patient's sternum, an automated mechanical ventilation device to induce negative pressure ventilation, and a controller operably coupled to the automated chest compression device and the automated mechanical ventilation device and including one or more processors configured to control the automated chest compression device to cyclically perform chest compressions, and control the automated mechanical ventilation device to cyclically induce the negative pressure ventilation out-of-phase with the chest compressions such that the automated mechanical ventilation device cyclically induces the negative pressure ventilation prior to each compression of the patient's sternum.