1. A method of catheterization, comprising the steps of: Inserting a probe into a heart of a living subject, the probe having a plurality of electrodes and sensors; displaying an electroanatomical map of the heart on a monitor; and during a time interval that does not exceed a duration of a cardiac cycle of the heart, performing the further steps of: reading data from at least one of the electrodes and sensors; invoking a processor to perform an algorithm on the data, the algorithm having a plurality of inputs and a result, wherein the data comprises one of the plurality of inputs and the result comprises a transformation of the data; and rendering the result on the monitor to modify the electroanatomical map.