title: [Clinical significance of functional weakness of the sinus node syndrome].
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D001146:Arrhythmia, Sinus / Q000503:physiopathology*; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D012849:Sinoatrial Node / Q000503:physiopathology; D013577:Syndrome
vernacular_title: O klinicheskom znachenii sindroma funktsional' noĭ slabosti sinusovogo uzla