Wearable Cardioverter Defibrillator (WCD) system logging events and broadcasting state changes and system status information to external clients

One or more non-transitory computer-readable media comprising one or more instructions that when executed on at least one processor of a wearable cardioverter defibrillator (“WCD”) system configure the processor to perform one or more operations to:

• store data corresponding to one or more event markers in a memory in response to an occurrence of an event;
• detect one or more parameters at one or more sensors, wherein the occurrence of the event is to be detected based at least in part on detection of the one or more parameters by the one or more sensors or a signal to be generated by one or more of electrodes coupled to a support structure configured to be worn by a patient so as to maintain at least some of the electrodes in contact with a body of the patient;
• and
• transmit, at a communication device, at least a portion of the stored event marker data to a remote device, wherein the at least a portion of the stored event marker data is transmitted immediately to the remote device responsive to an emergency event, and is otherwise transmitted periodically or by request,
• wherein a patient condition or a WCD system condition is to be detected based at least in part on analysis of the stored event marker data and/or the transmitted portion of the stored event marker data;
• wherein the event marker data is to be analyzed to determine a number of alarms that have occurred;
• and
• wherein the stored event marker data transmitted to the remote device includes noise data from an ECG signal to detect dry skin contact with one or more of the electrodes, and respiration data to detect a lead-off condition of one or more of the electrodes based at least on part on whether the ECG signal is in synch with the respiration data.

A method to provide a wearable cardioverter defibrillator (“WCD”) system, the method comprising:

• storing, at a processor, data corresponding to one or more event markers in a memory in response to an occurrence of an event;
• detecting one or more parameters at one or more sensors, wherein the occurrence of the event is detected based at least in part on detection of the one or more parameters by the one or more sensors or a signal generated by one or more of electrodes coupled to a support structure configured worn by a patient so as to maintain at least some of the electrodes in contact with a body of the patient;
• and
• transmitting, at a communication device, at least a portion of the stored event marker data to a remote device, wherein the at least a portion of the stored event marker data is transmitted immediately to the remote device responsive to an emergency event, and is otherwise transmitted periodically or by request,
• wherein a patient condition or a WCD system condition is detected based at least in part on analysis of the stored event marker data and/or the transmitted portion of the stored event marker data;
• wherein the event marker data is to be analyzed to determine a number of alarms that have occurred;
• and
• wherein the stored event marker data transmitted to the remote device includes noise data from an ECG signal to detect dry skin contact with one or more of the electrodes, and respiration data to detect a lead-off condition of one or more of the electrodes based at least on part on whether the ECG signal is in synch with the respiration data.