Network-accessible data about patient with wearable cardiac defibrillator system

A method for a wearable cardiac defibrillator (WCD) system to work with an output device, the WCD system including a support structure configured to be worn by a patient, an external defibrillator configured to be coupled to the support structure and configured to defibrillate the patient while the support structure is worn by the patient, a motion sensor coupled to the support structure, and a timer, the method comprising:

• defibrillating the patient while the support structure is worn by the patient;
• generating, by the motion sensor, motion event data;
• determining a duration of an inert period during which a motion statistic of the motion event data is less than a motion threshold;
• determining whether the duration of the inert period exceeds an inert threshold;
• and
• in response to a determination that the duration of the inert period exceeded the inert threshold, causing the output device to output a human-perceptible alert.

A wearable cardiac defibrillator (WCD) system comprising:

• a non-transitory computer-readable storage medium storing one or more programs which, when processed by at least one processor of the WCD system, the WCD system including a support structure configured to be worn by a patient, an external defibrillator coupled to the support structure, a motion sensor coupled to the support structure, and a timer coupled to the support structure, the WCD system performs operations comprising:
• defibrillating the patient while the support structure is worn by the patient;
• generating, by the motion sensor, motion event data;
• determining a duration of an inert period during which a motion statistic of the motion event data is less than a motion threshold;
• determining whether the duration of the inert period exceeds an inert threshold;
• and
• in response to a determination that the duration of the inert period exceeded the inert threshold, causing the output device to output a human-perceptible alert.