1. A method for displaying measurement data of different parameters of a biological target body in which time dependent events occur, the method comprising the following steps: a) defining a time interval within which the measurement data has to be displayed and/or evaluated; b) defining a time instant of begin of the time interval time varying event; c) generating a bi-dimensional graph of a function corresponding to at least one time dependent measurement signal, one direction of the bi-dimensional graph being a time axis; d) generating a M-mode image from echographic data recorded from echocardiographic equipment, the M-mode image having the time axis being chosen as having the same direction of the bi-dimensional graph of the function corresponding to the said time dependent measurement signal, the echographic data for generating the M-mode image having been directly acquired by a repeated firing of ultrasound beams and by receiving of the reflected ultrasound beams along a scan line at least for a time period corresponding to said defined time period, the scan line passes through an anatomical district comprising a bodily organ, the bodily organ has at least two moving parts which have a synchronized movement, the scan line passes through all of the synchronized moving parts; e) determining in each bi-dimensional graph of the function corresponding to the said at least one time dependent measurement signal and in the M-mode image the time instant of begin of the said time interval; f) resealing the time scale of the bi-dimensional graph of the function corresponding to the said at least one time dependent measurement signal and of the M-mode image to a unique and identical time scale in which the said defined time interval has an equal length along the time axis; and g) displaying the bi-dimensional graph of the function corresponding to the said at least one time dependent measurement signal, the bi-dimensional graph is directly overlaid on a background formed by the M-mode image by aligning the said time instant of begin of the said time interval in a coincident position, wherein the biological target body is a heart and time dependent measurement signal is an electrocardiographic (ECG) signal.