title: [Sick sinus node syndrome].
abstract: The clinical and ECG findings of four cases with sinuatrial nodal disease are reported. The first case is characterized by sharply manifested rhythm bradycardia, the second--be a considerable heterotropic rhythm from the atrioventricular combination, the third--sinu-atrial block and the fourth--typical example of Tachycardisa-Bradycardia syndrome. In all four cases, episodes of syncopes are present, due to an extreme sinus bradycardia, conductivity block in sinu-atrial zone and possible re-entry mechanism of tachycardia paroxysms in case with Tychycardia-Bradycardia syndrome.
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D001146:Arrhythmia, Sinus / Q000503:physiopathology*; D004562:Electrocardiography; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D012848:Sinoatrial Block / Q000503:physiopathology; D013577:Syndrome
vernacular_title: Sindrom na "bolniia sinusov vuzel".