System and method for detecting atrial fibrillation

A system for processing ECG data to detect atrial fibrillation (AFIB), the system comprising:

• a beat module comprising instructions stored on non-transitory storage media and executed to:
• receive a time series of ECG data;
• identify heart beats in the time series of ECG data;
• determine a beat AFIB value based on a timing of each identified heart beat, wherein the beat AFIB value represents a presence or absence of AFIB based on variability in the timing of each identified heart beat;
• a segment module comprising instructions stored on non-transitory storage media and executed to:
• receive the time series of ECG data;
• divide the time series of ECG data into two or more time segments;
• determine a segment AFIB value for each time segment, wherein the segment AFIB value indicates a presence or absence of AFIB in the time segment based on whether any of a set of known rhythms are identified;
• an AFIB detection module comprising instructions stored on non-transitory storage media and executed to determine an AFIB identification value for each time segment based on a combination of the beat AFIB value during that time segment and the segment AFIB value for that time segment.