[Complications of the Catheter Treatment of Atrial Fibrillation: Stenosis of All Pulmonary Veins after Radiofrequency Ablation].

Radiofrequency ablation is the "gold standard" in atrial fibrillation treatment. The frequency of complications is about 3.5-3.

[Functional state of maxillofacial muscles in patients with dentition defects depending on the number of missing antagonist pairs].

Changes in the functions of maxillofacial muscles were studied in patients with first-class defects of dentition. The mean biopotential of masticatory muscles in patients lacking 1 antagonist pair is 30.4% and in those lacking 4 pairs 59.

[The characteristics of the muscular activity of the maxillofacial area in persons with partial tooth loss depending on the extent of the dentition defect].

The electromyogram (EMG) amplitude of the masticatory and temporal muscles is decreased and EMG amplitude of suprasublingual muscles increased during mastication or voluntary occlusion in patients with class I dentition defects in comparison with the controls. The changes were the greater, the more antagonist pairs were missing. The duration of masticatory period and the number of masticatory movements increased.

[The functional state of the muscles of the maxillofacial area during immediate denture placement].

Electromyographic studies demonstrated that immediate dentures ensure full-value repair of the functions of the masticatory, temporal, and suprahyoid muscles. Six months after fitting with dentures the coordination of antagonist and synergist muscles was impaired in but 18% of patients. The author emphasizes that immediate dentures are the most rational and pathogenetically valid orthodontic treatment preventing maxillodental deformations.

[The function of the maxillofacial muscles in dentition defects and periodontal diseases].

Quantitative and qualitative changes of the function of the jaws in dentition defects and periodontal diseases were assessed. Besides dysfunction of every muscle involved, disordered relationships between antagonist and synergic muscles were revealed. Coordinated activity of maxillofacial muscles was 56.