1. A measurement method of time varying events in a target body, comprising the steps of: a) providing one or more time dependent measurements signals of one or more parameters of the time varying events in the target body by means of one or more measurement devices or probes; b) providing one or more ecographic M-mode (Motion mode) image data whose spatial direction is along one or more scan-lines or curves; c) defining a time interval within which the measurement signals has to be displayed and/or evaluated; d) defining a time instant of begin of the said time interval having a univoquely relation to one or more time varying events; e) generating a bi-dimensional graph of the function corresponding to each said time dependent measurement signal one direction of the said bi-dimensional graph being the time axis; f) generating one or more bi-dimensional M-mode images, the time axis being chosen as having the same direction of the graph of the function corresponding to the said time dependent measurement signals; g) determining in each graph of the function corresponding to each said time dependent measurement signal and in the M-mode images the time instant of begin of the said time interval having a univoquely relation to one or more time varying events; h) resealing the time scale of each graph of the function corresponding to each said time dependent measurement signal and of the M-mode images to a unique and identical time scale in which the said defined time interval has an equal length along the time axis; and i) displaying the graph of the function corresponding to one or more of the said time dependent measurement signal on a background formed by one or more of the M-mode images by aligning the said time instant of begin of the said time interval in a coincident position.