title: [Diagnostic application of external electrical impulses in form of an overdrive for the influence of an implanted QRS inhibited demand pacemaker system (author's transl)].
abstract: The possibility of influencing an implanted demand pacemaker system by means of an external electrical impulse has already been described by several authors. In this paper further clinical applications of this method are discussed in relationship to patients who have a pacemaker of the QRS inhibited type. Electrodes are applied externally over the regions of the pacemaker generator and the catheter tip. Electrical impulses are then given at a higher frequency than those of the implanted pacemaker, thus enabling the impulses of the internal pacemaker to be inhibited, and consequently the spontaneous action of the heart to be observed. Further possible clinical applications with the aid of examples are discussed: the identification of persistent arrhythmias, digitalis intoxication, fresh cardiac ischaemias, as well as evidence of the need for temporary stimulation during generator change.
mesh_terms: D000368:Aged; D001145:Arrhythmias, Cardiac / Q000175:diagnosis / Q000503:physiopathology*; D001919:Bradycardia / Q000628:therapy; D004558:Electric Stimulation; D004566:Electrodes; D005260:Female; D006321:Heart / Q000503:physiopathology; D006334:Heart Function Tests; D006801:Humans; D008297:Male; D008875:Middle Aged; D010138:Pacemaker, Artificial
vernacular_title: Diagnostische Anwendung externer Stromimpulse in Form eines Overdriving bei Herzschrittmacherpatienten. Beeinflussung implantierter QRS-inhibierter Demand-Schrittmachersysteme