Arrhythmia detection and confirmation

A method comprising:

• sampling, by a leadless cardiac pacemaker, a signal generated by a sensor in accordance with a first set of sampling parameters;
• receiving, by the leadless cardiac pacemaker, an indication from a remote device that a cardiac arrhythmia is detected by the remote device;
• after receiving the indication of an occurrence of a cardiac arrhythmia detected by the remote device, sampling by the leadless cardiac pacemaker, the signal generated by the sensor in accordance with a second set of sampling parameters, wherein the second set of sampling parameters are different from the first set of sampling parameters;
• confirming, based on the signal sampled according to the second set of sampling parameters, whether a cardiac arrhythmia is occurring or not;
• and
• when a cardiac arrhythmia is confirmed based on the signal sampled by the leadless cardiac pacemaker, delivering a therapy to treat the cardiac arrhythmia.

A leadless cardiac pacemaker (LCP) comprising:

• a plurality of electrodes;
• an accelerometer;
• and
• a controller connected to the plurality of electrodes and the accelerometer, the controller configured to:
• receive an indication from another device that an arrhythmia is detected, and in response, confirm whether a cardiac arrhythmia is occurring or not based at least in part on a signal generated by the accelerometer;
• and
• transmit whether a cardiac arrhythmia is confirmed.