Automatic method for measuring and processing of blood pressure comprising the steps of: A. have a signal sampled detected pressure P (t) for one or more heartbeats, each heartbeat that begins at an initial instant coinciding with one of the points of initial diastolic and ending at a final instant coinciding with the point of diastolic pressure back and comprising a dicrotic point, each beat has a systolic phase is from initial diastolic point to point dicrotic and B. analyze and automatically discriminating the morphology of the pressure signal P (t) sampled for each beat of the heart 10, and determine the time pressure value of one or more characteristic points of the pressure signal P (t) selected it from the group comprising - a point of initial diastolic, - a point systolic pressure, - a dicrotic point, and - one or more resonance points, each of which occurs at a moment where a second derivative 2P / dt2 of the pressure signal P (t) has a local maximum, at least one characteristic point of the pressure signal P (t) belonging to the systolic phase of the heart beat and studio that is different from the pressure point initial diastolic the method being characterized by further comprising the steps of: C. for each heartbeat, determine an RES energy performance through the following substeps: C.1 determining a direct dynamic impedance Zd_D (t) for each of said one or more characteristic points belonging to the systolic phase of the heart beat in study and different point of initial diastolic, said direct dynamic impedance Zd_D (t) which is equal to the relationship between a value of the pressure signal P (t) in the feature point and the distance of the instant respective time of initial instant heartbeat study and determine a ZD impedance direct pressure wave by adding with alternating signs the impedances dynamic direct Zd_D ( t) sorted according to an order of direct time starting from the initial moment of heartbeat study until time point d croto, start apply
