A calculation procedure diagnostic parameter for diagnosis using a sistemade diagnosis including a central computer (30) and one or more terminal equipment (20) connected to dichoequipo exchange (30) via a network (40), wherein each of said terminal devices (20) comprises an electrocardiograph (21), means (22) for data collection to collect delelectrocardiograma data measured by said electrocardiograph (21) and produce and edit the shipping information for central dichoequipo (30), and an interface (23) communicating with said network (40), and wherein said central computer (30) comprises an interface (31) communication to receive data sent from each of dichosequipos terminals (20 ) via said network (40), means (33) recording for recording datosrecibidos with said interface (31) communication, a processor device (32) comprising means (37) detecting RR intervals, a means (38) calculating characteristic quantities and means (39) decálculo diagnostic parameter, and a device (34) display dichoprocedimiento comprising the steps of: collecting digital electrocardiogram data for a predetermined time interval using elelectrocardiógrafo (21) of said one or more terminal equipment (20) editing data using the collected digital electrocardiogram means (22) making data terminals UNOO more computers (20) send digital data to the central computer edited electrocardiogram (30) through said network (40) using the interface (23) communicating the one or more terminal equipment (20) receive digital electrocardiogram data sent using the interface (31) equipocentral communication (30) recording the digital electrocardiogram data using the means (33) recording detecting, using the means (37) detecting RR intervals, RR intervals of the digital delelectrocardiograma recorded data to generate time series data of intervals RR successive, characterized in that the method further comprises the steps of: generating, using the device processor (32), a series of partial sets B (j), each of loscua
