System and method for electrocardiogram analysis and optimization of cardiopulmonary resuscitation and therapy delivery

A system for treating a cardiac arrest patient, the system comprising:

• an EGG monitor;
• and
• a mechanical chest compression device configured to automatically deliver a series of chest compressions and ventilation pauses, wherein the ECG monitor is configured to filter the ECG signal to remove the compression artifact and produce a filtered ECG signal, wherein the ECG monitor is further configured to display the filtered signal when the mechanical chest compression device is delivering chest compressions and displays the unfiltered ECG signal during ventilation pauses, wherein the ECG monitor includes a filter configured to perform the filtering of the ECG signal by attenuating a plurality of regularly spaced bands, and wherein the ECG monitor includes a filter protection switch configured to switch to a protected mode during pauses in the chest compressions to protect the filter during the pauses in the chest compressions.