An assembly for evaluating the sympathovagal balance, SVB, of a patient, which assembly includes an active medical device having: - a generator capable of producing bursts of controlled kinesthetic stimulation pulses; - at least one kinesthetic effector configured to be applied to an external skin site of the patient, and comprising a vibrating electromechanical transducer configured to receive the pulses produced by the generator and deliver a given kinesthetic stimulation energy at a stimulation frequency of 250 Hz; the kinesthetic effector being configured to produce at the patient's external skin site a vibrating mechanical stimulation that is detectable by the patient's sensory or mechanoreceptor skin receptors; and - means for collecting at least one physiological signal representative of cardiac activity, the assembly being configured such that the at least one physiological signal collected by the collecting means makes it possible to control the generator so that it can deliver bursts of ANS pulses to the kinesthetic effector; - means for controlled activation of the generator at programmed intervals, for the production during a predetermined test period of kinesthetic stimulation bursts; - means for measuring, for each burst of kinesthetic stimulation, at least one control parameter of the patient's current autonomic activity, derived from the at least one physiological signal collected; - means for calculating the variation of said at least one control parameter resulting from kinesthetic stimulation, this variation being calculated from values of the at least one control parameter comprising at least two values among: i) a base value measured over a period (BASE) at steady state prior to the production of the burst of kinesthetic stimulation pulses; ii) a current value measured during a period of production of the burst of kinesthetic stimulation pulses; and iii) a current value measured during a recovery period (RECOVERY) after the production of the burst of kinesthetic stimulation pulses; and - evaluating means, capable of determining an SVB index as a function of the variations of the at least one control parameter resulting from kinesthetic stimulation, calculated during said predetermined test period. - a generator capable of producing bursts of controlled kinesthetic stimulation pulses; - at least one kinesthetic effector configured to be applied to an external skin site of the patient, and comprising a vibrating electromechanical transducer configured to receive the pulses produced by the generator and deliver a given kinesthetic stimulation energy at a stimulation frequency of 250 Hz; the kinesthetic effector being configured to produce at the patient's external skin site a vibrating mechanical stimulation that is detectable by the patient's sensory or mechanoreceptor skin receptors; and - means for collecting at least one physiological signal representative of cardiac activity, the assembly being configured such that the at least one physiological signal collected by the collecting means makes it possible to control the generator so that it can deliver bursts of ANS pulses to the kinesthetic effector; - means for controlled activation of the generator at programmed intervals, for the production during a predetermined test period of kinesthetic stimulation bursts; - means for measuring, for each burst of kinesthetic stimulation, at least one control parameter of the patient's current autonomic activity, derived from the at least one physiological signal collected; - means for calculating the variation of said at least one control parameter resulting from kinesthetic stimulation, this variation being calculated from values of the at least one control parameter comprising at least two values among: i) a base value measured over a period (BASE) at steady state prior to the production of the burst of kinesthetic stimulation pulses; ii) a current value measured during a period of production of the burst of kinesthetic stimulation pulses; and iii) a current value measured during a recovery period (RECOVERY) after the production of the burst of kinesthetic stimulation pulses; and i) a base value measured over a period (BASE) at steady state prior to the production of the burst of kinesthetic stimulation pulses; ii) a current value measured during a period of production of the burst of kinesthetic stimulation pulses; and iii) a current value measured during a recovery period (RECOVERY) after the production of the burst of kinesthetic stimulation pulses; and - evaluating means, capable of determining an SVB index as a function of the variations of the at least one control parameter resulting from kinesthetic stimulation, calculated during said predetermined test period.