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:

Abstract: A single introduction electro-catheter to be used for permanent, semipermanent or termporary cardiac stimulation through the Coronary Sinus. Said electro-catheter featuring the possibility to stimulate from one to four cardiac chambers, according to the preferred stimulation protocol, either in sequence or simultaneously, said catheter being characterized by part or all of the following features. A) A configuration such to be able to support one, two three or four electrodes, placed on separated segments whenever necessary, said electrodes being placed in contact with the targeted cardiac chambers. B) A stent structure is permanently tied to the electro-catheter, in its distal portion close to the electrode bearing portion of said lead. C) The stent structure, and the mated electro-catheter segments will be kept in their compressed form while introduced in the access vein. Such compressed form being of an acceptable diameter for trasvenous introduction.

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:

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: Electrocatheter for sequential cardiostimulation, comprising one or more atrial electrodes and one or more ventricular electrodes connectable to a dual chamber pacemaker via respective interface connectors, said electrocatheter being suitably shaped to allow the insertion thereof into the coronary sinus so as to position the atrial electrodes within the coronary sinus in correspondence of the left atrium of the heart, and the ventricular electrodes within the great cardiac vein where the anterior interventricular begins, in correspondence of the left ventricle, wherein the ventricular electrodes are located close to the distal end of the catheter to allow the ventricular stimulation and sensing, and wherein the atrial electrodes are suitably spaced from the ventricular ones and disposed upstream thereof to permit the atrial stimulation and sensing. (FIG.

Abstract: The invention provides an automatic implantable defibrillator with the following essential characteristics: a) reliable recognition of a ventricular fibrillation state by noting mechanical ventricular systole noise and taking action if absent; b) effecting defibrillation not by electrical pulses fed to the heart but by a bolus of medicaments (or solutions under particular physical conditions, such as a cold bolus at 30.degree. C.) fed by a hydraulic system into the coronary sinus by a retrograde path to obtain an artificial circulation so as to rapidly pervade the coronary circuit. The symbol A.I.Ph.D. (Automatic Implantable Pharmacological Defibrillator) is proposed (D.A.I.F., Defibrillatore Automatico Impiantabile Farmacologico, in Italian).

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.

Abstract: A relay circuit for a cardiac pacemaker having a stimulator implanted in a user.