title: [Sick sinus disease: observation of 57 cases].
mesh_terms: D000328:Adult; D000367:Age Factors; D000368:Aged; D001146:Arrhythmia, Sinus / Q000175:diagnosis* / Q000628:therapy; D004558:Electric Stimulation; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D012737:Sex Factors; D012849:Sinoatrial Node
vernacular_title: Choroba wezła zatokowego: obserwacja 57 przypadków