title: [Occurrence of repetitive ventricular responses in programmed right ventricular stimulation].
abstract: In 30 patients with various disturbances of rhythm (17 males, 13 females) at the age of 16-72 years during a conduction analysis a programmed stimulation relating to the right ventricle was carried out and the occurrence of repetitive ventricular responses was evaluated. 9 patients did not show any repetitive ventricular responses. In 14 patients with various disturbances of rhythm a V3-phenomenon was evoked which as an interventricular reentry is a physiological phenomenon. In 6 patients with myocardial scar and extreme bradycardia, respectively, apical torsades were observed via a V3-phenomenon with transition into an intraventricular reentry (one persisting interventricular reentry) and like 2 provoked ventricular tachycardias (one with, one without observation of apical torsades) were valuated as a reference to the electric instability of the ventricular myocardium. The obtainability of apical torsades as well as of V3 was possible only in a minimal retardation of the conduction to His's bundle depending upon the frequency of stimulation and precociousness of S2. Only in a transition into an intraventricular reentry apical torsades speak for, non-evokable apical torsades do not speak against an increased electric instability of the ventricular myocardium, but for existing and not existing, respectively, suitable distal conduction conditions to the stimulation reentry.
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D001145:Arrhythmias, Cardiac / Q000503:physiopathology*; D005117:Cardiac Complexes, Premature / Q000503:physiopathology; D004558:Electric Stimulation; D004562:Electrocardiography; D005260:Female; D006329:Heart Conduction System / Q000503:physiopathology*; D006352:Heart Ventricles / Q000503:physiopathology; D006801:Humans; D008297:Male; D008875:Middle Aged; D013610:Tachycardia / Q000503:physiopathology
vernacular_title: Zum Auftreten von Repetitive Ventricular Responses bei programmierter rechtsventrikulärer Stimulation.