Abstract: An implantable electrical heart defibrillation system for both ventricle and atrium is proposed and is characterized in that it acts in a manner such as:to diagnose the type of arrhythmia within a maximum time of 2 seconds from the onset of the arrhythmia;to deliver the therapeutic shock by electrodes implanted in the region to be defibrillated no more than 4-5 seconds after the recognition of the arrhythmia, if it is ventricular fibrillation, so that the patient does not loose consciousness;immediately after the onset of the arrhythmia and before the defibrillation shock is delivered, to prevent the conduction of neural pain signals coming from the region in which the electric shock acts, by nerve stimulation by a catheter inserted in the spinal column, utilizing the gate effect, or by the perfusion of a drug with immediate analgesic effect by an infusion pump and a catheter positioned in the region affected by the pain signals.

Abstract: Method and apparatus for acquiring and processing electrocardiographic signals comprising the steps of detecting and recording a first basic electrocardiographic waveform of a subject tested under relaxed condition, i.e at rest, and a second electrocardiographic waveform of the same subject tested at the end of an induced stress, which method further comprises comparing the said basic waveform with the second waveform and detecting, from the thus operated comparison, the instant in which a change in the second waveform takes place, by evaluating the time elapsed from a preset initial instant. (FIG. 1).

Abstract: A pacemaker used for cardiac stimulation has its stimulation frequency varied according to the changing metabolic requirements of a subject pacemaker user due to stress, emotion and the like. Control of the stimulation frequency is based essentially on the variation in the rising slope of T wave signals from the subject user.