1. An apparatus, comprising: a medical positioning system (MPS) comprising circuitry to detect a current position and a current orientation of an MPS sensor coupled to a tip portion of a probe catheter; a first processor comprising circuitry to electrically communicate with said MPS and with an image detector configured to detect a first image of a heart, said first processor being adapted to register the MPS with the image detector; a second processor comprising circuitry to determine a respective tissue target location and a respective target probe orientation, at which at least one heart parameter value is to be measured for each of a plurality of tissue targets within said heart; a third processor comprising circuitry to confirm that said tip portion is located at said respective tissue target location by comparing a currently detected location of said tip portion with said respective tissue target location; a fourth processor comprising circuitry to confirm that said tip portion is oriented at said respective target probe orientation by comparing a currently detected orientation of said tip portion with said respective target probe orientation; a heart parameter measurement unit configured to measure said at least one heart parameter value via a heart parameter sensor coupled to said tip portion; and a fifth processor comprising circuitry to superimpose said at least one heart parameter value at said respective tissue target locations on a second image of said heart to produce an electrophysiological map of said heart.