A medical apparatus, comprising: a probe configured for insertion into a body of a patient and comprising a plurality of electrodes configured to contact tissue within the body in a sequence of time intervals; a display screen; a position-tracking system configured to acquire position coordinates of the electrodes within the body; and a processor configured to: acquire respective electrophysiological signals from a group of the electrodes in each time interval in the sequence while the electrodes contact an area of the tissue at respective locations within the area; extract respective electrophysiological parameters from the respective electrophysiological signals acquired in each time interval by the electrodes in the group; for each time interval, compute a respective measure of consistency of the respective electrophysiological parameters across the electrodes in the group; and render to the display screen a three-dimensional, 3D, map of the tissue while: superimposing on the map, responsively to the position coordinates, a visual indication of the extracted electrophysiological parameters at the respective locations of the electrodes in the time intervals for which the respective measure of consistency satisfied a predefined consistency criterion, and automatically discarding from the map the electrophysiological parameters extracted in the time intervals for which the respective measure of consistency did not satisfy the predefined consistency criterion. a probe configured for insertion into a body of a patient and comprising a plurality of electrodes configured to contact tissue within the body in a sequence of time intervals; a display screen; a position-tracking system configured to acquire position coordinates of the electrodes within the body; and a processor configured to: acquire respective electrophysiological signals from a group of the electrodes in each time interval in the sequence while the electrodes contact an area of the tissue at respective locations within the area; extract respective electrophysiological parameters from the respective electrophysiological signals acquired in each time interval by the electrodes in the group; for each time interval, compute a respective measure of consistency of the respective electrophysiological parameters across the electrodes in the group; and render to the display screen a three-dimensional, 3D, map of the tissue while: superimposing on the map, responsively to the position coordinates, a visual indication of the extracted electrophysiological parameters at the respective locations of the electrodes in the time intervals for which the respective measure of consistency satisfied a predefined consistency criterion, and automatically discarding from the map the electrophysiological parameters extracted in the time intervals for which the respective measure of consistency did not satisfy the predefined consistency criterion. acquire respective electrophysiological signals from a group of the electrodes in each time interval in the sequence while the electrodes contact an area of the tissue at respective locations within the area; extract respective electrophysiological parameters from the respective electrophysiological signals acquired in each time interval by the electrodes in the group; for each time interval, compute a respective measure of consistency of the respective electrophysiological parameters across the electrodes in the group; and render to the display screen a three-dimensional, 3D, map of the tissue while: superimposing on the map, responsively to the position coordinates, a visual indication of the extracted electrophysiological parameters at the respective locations of the electrodes in the time intervals for which the respective measure of consistency satisfied a predefined consistency criterion, and automatically discarding from the map the electrophysiological parameters extracted in the time intervals for which the respective measure of consistency did not satisfy the predefined consistency criterion. superimposing on the map, responsively to the position coordinates, a visual indication of the extracted electrophysiological parameters at the respective locations of the electrodes in the time intervals for which the respective measure of consistency satisfied a predefined consistency criterion, and automatically discarding from the map the electrophysiological parameters extracted in the time intervals for which the respective measure of consistency did not satisfy the predefined consistency criterion.