Weighting projected electrophysiological wave velocity with sigmoid curve

A system, comprising:

• a probe comprising a plurality of electrodes configured to be inserted into a heart of a patient, detect electrophysiological activity in the heart, and output electrophysiological signals;
• an interface which is configured to receive the electrophysiological signals from the probe;
• one or more processors, which are configured to:
• calculate at least positions and respective electrophysiological wave propagation velocity vectors based at least in part on the electrophysiological signals relative to an anatomical map of at least a portion of the heart, the electrophysiological wave propagation velocity vectors having respective magnitudes and directions;
• nonlinearly scale the magnitudes by:
• dividing a range of the magnitudes into a low-magnitude value region, a high-magnitude value region, and an intermediate-magnitude value region, the low-magnitude value region including magnitudes less than or equal to a first threshold, the high-magnitude region including magnitudes greater than or equal to a second threshold, and the intermediate-magnitude value region including magnitudes between the first threshold and the second threshold,
• scaling magnitudes in the low-magnitude value region to a first weight,
• scaling magnitudes in the intermediate-magnitude value region to a second weight, and
• scaling magnitudes within the high-magnitude value region to a third weight, the second weight being greater than the first weight and the third weight;
• and
• calculate lengths of arrows representing the respective electrophysiological wave propagation velocity vectors, the length of each arrow being adjusted to indicate the scaled magnitude of the corresponding electrophysiological wave propagation velocity vectors;
• and
• a display configured to present to a user the arrows overlaid on at least a region of the anatomical map, each arrow having a respective length that is adjusted to be indicative of a corresponding scaled magnitude, the lengths of the respective arrows at least one of:
• visually emphasizing magnitude differences within the intermediate-magnitude region relative to the low-magnitude region and the high-magnitude region, and
• visually suppressing magnitude differences within the low-magnitude region and the high-magnitude region relative to the intermediate-magnitude region.