title: [Transesophageal atrial stimulation in hypothyroidism. 1. Studies of cardiac automatism].
abstract: Electrophysiologic investigations of the heart with the aid of transoesophageal atrium stimulation (extra-stimulus technique and overdriving stimulation) have been performed in 19 patients with primary hypothyroidism and a normal electrocardiogram in standard linkages. The control group comprised 34 healthy persons. In 68% of patients with hypothyroidism there have been stated a prolonged refraction time of the atrium-ventricular and intraventricular conductivity system while in the case of healthy persons an analogic type of changes has been observed only in 12%. Atrium overdriving stimulation has shown a decrease of the atrium-ventricular conductibility at a frequency below 130/min and in 74% of the patients with hypothyroidism the blocking assumed a shape of Wenckebach's periodic.
mesh_terms: D000328:Adult; D002304:Cardiac Pacing, Artificial; D004562:Electrocardiography; D004947:Esophagus; D005260:Female; D006321:Heart / Q000503:physiopathology*; D006325:Heart Atria / Q000503:physiopathology; D006329:Heart Conduction System / Q000503:physiopathology; D006801:Humans; D007037:Hypothyroidism / Q000503:physiopathology*; D008297:Male; D008875:Middle Aged
vernacular_title: Die transösophageale Vorhofstimulation bei Patienten mit Hypothyreose. 1. Untersuchungen der Herzautomatie.