title: [State of the heart conduction system in the sick sinus syndrome (according to the recording of the bundle of His potentials and the atrial stimulation test)].
abstract: It was established that the presence of Samoilov-Wenckebach's periods and prolongation of the H--V interval at low frequency of the imposed rhythm as well as periods of asystolia of more than 1,200 msec are most typical for these patients. An attempt was made to determine the type of cardiac stimulation indicated for such patients from the character of the disorders of rhythm observed in them and the initial frequency of their own cardiac contractions.
mesh_terms: D000200:Action Potentials; D000368:Aged; D001919:Bradycardia / Q000209:etiology; D002036:Bundle of His / Q000503:physiopathology*; D002037:Bundle-Branch Block / Q000209:etiology; D005117:Cardiac Complexes, Premature / Q000209:etiology; D004558:Electric Stimulation; D004562:Electrocardiography; D004567:Electrodes, Implanted; D005260:Female; D006325:Heart Atria; D006327:Heart Block / Q000209:etiology / Q000503:physiopathology*; D006329:Heart Conduction System / Q000503:physiopathology*; D006801:Humans; D008297:Male; D008875:Middle Aged; D012848:Sinoatrial Block / Q000503:physiopathology*; D012849:Sinoatrial Node / Q000503:physiopathology*
vernacular_title: Sostoianie provodiashcheĭ sistemy serdtsa pri sindrome slabosti sinusovogo uzla (po dannym registratsii potentsialov puchka Gisa i testa predserdnoĭ stimuliatsii).