A medical system for wave propagation enhancement, the medical system comprising: a catheter configured to be inserted into a chamber of a heart, and including electrodes (52, 55) configured to capture electrical activity of tissue of the chamber over time; a display; and processing circuitry configured to: identify local activation times (LATs) from the captured electrical activity and associate the local activation times with respective positions on the surface of an anatomical map of the chamber; compute a propagation of a cardiac activation wave over the anatomical map of the chamber from a start time in a cardiac cycle to an end time in the cardiac cycle responsively to the captured electrical activity, wherein the propagation of the cardiac activation wave is calculated using a sliding window of the local activation times; render to the display a sub-region of the anatomical map; select a time-bounded portion of the propagation of the cardiac activation wave commencing at a time after the start time, wherein the time after the start time is the earliest time the wave would arrive in the sub-region of the anatomical map; and render to the display the time-bounded portion of the propagation of the cardiac activation wave on the sub-region of the anatomical map. a catheter configured to be inserted into a chamber of a heart, and including electrodes (52, 55) configured to capture electrical activity of tissue of the chamber over time; a display; and processing circuitry configured to: identify local activation times (LATs) from the captured electrical activity and associate the local activation times with respective positions on the surface of an anatomical map of the chamber; compute a propagation of a cardiac activation wave over the anatomical map of the chamber from a start time in a cardiac cycle to an end time in the cardiac cycle responsively to the captured electrical activity, wherein the propagation of the cardiac activation wave is calculated using a sliding window of the local activation times; render to the display a sub-region of the anatomical map; select a time-bounded portion of the propagation of the cardiac activation wave commencing at a time after the start time, wherein the time after the start time is the earliest time the wave would arrive in the sub-region of the anatomical map; and render to the display the time-bounded portion of the propagation of the cardiac activation wave on the sub-region of the anatomical map. identify local activation times (LATs) from the captured electrical activity and associate the local activation times with respective positions on the surface of an anatomical map of the chamber; compute a propagation of a cardiac activation wave over the anatomical map of the chamber from a start time in a cardiac cycle to an end time in the cardiac cycle responsively to the captured electrical activity, wherein the propagation of the cardiac activation wave is calculated using a sliding window of the local activation times; render to the display a sub-region of the anatomical map; select a time-bounded portion of the propagation of the cardiac activation wave commencing at a time after the start time, wherein the time after the start time is the earliest time the wave would arrive in the sub-region of the anatomical map; and render to the display the time-bounded portion of the propagation of the cardiac activation wave on the sub-region of the anatomical map.