System and method to select signal segments for analysis of a biological rhythm disorder

A system to select signal segments of multiple cardiac signals, the system comprising:

• a processing device;
• and
• a memory device to store instructions that, when executed by the processing device, cause the processing device to perform operations comprising:
• correlating a signal segment in at least one first cardiac signal to the signal segment itself as shifted by a plurality of time offsets to determine a highest correlation coefficient associated with periodicity of the signal segment in the at least one first cardiac signal;
• correlating a signal segment in at least one second cardiac signal to the signal segment itself as shifted by the plurality of time offsets to determine a highest correlation coefficient associated with periodicity of the signal segment in the at least one second cardiac signal;
• repeating the correlating for additional signal segments in the at least one first cardiac signal and additional signal segments in the at least one second cardiac signal to determine a highest correlation coefficient associated with periodicity of each of the additional signal segments;
• generating a plurality of composite correlation coefficients using highest correlation coefficients for the signal segments of the at least one first cardiac signal and the signal segments of the at least one second cardiac signal, each of the plurality of composite correlation coefficients associated with signal segments of the at least one first cardiac signal that are approximately contemporaneous with signal segments of the at least one second cardiac signal;
• and
• selecting a set of signal segments including at least one signal segment from the at least one first cardiac signal and at least one signal segment from the at least one second cardiac signal, the set of signal segments being associated with a highest composite correlation coefficient from the plurality of composite correlation coefficients.