Selective activation of chest compressions synchronized with myocardial activity

A system for providing resuscitative chest compressions to a chest of a patient, the system comprising:

• a chest compressor configured to be applied to the chest of the patient and to administer chest compressions to the patient;
• one or more sensors communicatively coupled to a medical device and configured to sense electrocardiogram (ECG) signals of the patient and to transmit the ECG signals to the medical device;
• and
• at least one processor coupled to memory of the medical device, the at least one processor and memory configured to:
• receive the ECG signals,
• determine an intrinsic heart rate of the patient based on the ECG signals,
• identify at least one ECG waveform feature within the ECG signals,
• select a chest compression protocol from at least three predetermined chest compression protocols for administration to the patient based on the intrinsic heart rate of the patient, the at least three predetermined chest compression protocols comprising a first chest compression protocol selected based on whether the intrinsic heart rate of the patient falls within a first range, a second chest compression protocol selected based on whether the intrinsic heart rate of the patient falls within a second range, and a third chest compression protocol selected based on whether the intrinsic heart rate of the patient falls within a third range, the first range, second range, and third range being distinct from one another, and
• control the chest compressor based on the selected chest compression protocol.