title: [Clinical observations of variants of sinus node dysfunction].
mesh_terms: D004562:Electrocardiography; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D012804:Sick Sinus Syndrome / Q000175:diagnosis* / Q000503:physiopathology; D012849:Sinoatrial Node / Q000503:physiopathology
vernacular_title: Klinicheskie nabliudeniia nekotorykh variantov disfunktsii sinusovogo uzla.