Abstract: Elementary capacitor of high energy density and high voltage, for energy accumulation, discharge, commutation or filtering purposes, comprising two conductive armatures separated by at least one dielectric layer, characterized in that each armature is associated, with at least one layer of a first dielectric, in that each armature is formed by a metallization having a resistance per surface unit of between 2 and 30 ohm, being applied on a second dielectric made of a fibrous support favoring regeneration in such a manner that the capacitor will be regenerating (self-curing), in that the capacitor is impregnated with a liquid dielectric, in that the thickness and the nature of each dielectric as well as the liquid dielectric are so selected to ensure that when the rated voltage is applied, the ratio between the prevailing electric field strength and the disruptive strength is substantially equal for each of the dielectrics.

Abstract: A device for a defibrillating or cardioverting electric shock to a patient for correcting securement tachyarrhythmias features of a catheter for insertion through the right atrium and into the right ventricle for locating a heartbeat sensor inside the heart and at least one discharge electrode in the right ventricle spaced from the interior surface of the heart, another discharge electrode external to the heart and circuitry connected by the catheter between the sensor and discharge electrodes for supplying electric shock to the discharge electrodes in response to a signal from the heartbeat sensor.