title: [Etiology of the sick sinus syndrome].
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D001145:Arrhythmias, Cardiac / Q000453:epidemiology / Q000209:etiology*; D005260:Female; D006801:Humans; D006980:Hyperthyroidism / Q000150:complications; D008297:Male; D008875:Middle Aged; D012737:Sex Factors; D013577:Syndrome
vernacular_title: Przyczynek do badań nad etiologia choroby wezła zatokowego.