Global histogram of local cycle length

A system for processing cardiac information, the system comprising:

• a processing unit configured to:
• receive an activation waveform comprising a set of activation waveform data of a plurality of signal sections collected at a plurality of locations;
• receive a set of window parameters comprising a range of window size;
• for each signal section of the plurality of signal sections,
• determine a set of confidence values, each confidence value corresponding to a window size, by iterating through a plurality of window sizes in the range of window size;
• for each window size of the plurality of window sizes,
• select a position of a central window, the central window having the each window size;
• calculate a set of correlations, each of the set of correlations being a correlation of the activation waveform in the central window and the activation waveform in a shifted window, the shifted window being a sample window shifted from the central window and having the each window size;
• and
• determine one of the set of confidence values based on the set of correlations;
• and
• compare the set of confidence values to select a designated confidence value and a selected window size corresponding to the designated confidence value;
• and
• determine one of a plurality of local cycle lengths for the each of the plurality of signal sections based on the selected window size;
• and
• generate a local cycle length histogram based on the plurality of local cycle lengths.