Update of the Diagnostic Criteria of J-Wave Syndrome: New Concepts and Their Relevance to Cardiology Practice (According to Materials of J-Wave Syndromes Expert Consensus Conference Report: Emerging Concepts and Gaps in Knowledge (2016).

This review includes main positions of the revision of diagnostic criteria of "J-wave syndromes in the J-Wave Syndromes Expert Consensus Conference Report: Emerging Concepts and Gaps in Knowledge" (2016). The article, systematized according to the sections of the above-mentioned document, outlines the questions of terminology, new criteria for diagnosis of the Brugada syndrome (BrS) and early repolarization syndrome (ERS). The section devoted to ERS on the issues of new terminology and standardization of measurements, is supplemented with material from the Consensus Paper - The Early Repolarization Pattern (2015). The article also presents the issues of differential diagnosis in BrS, presents modulating factors, defines acquired Brugada-pattern and Brugada phenocopies. The similarities and differences between BrS and ERS are presented in a comparative aspect.

[Assessment of heart rate circadian rhythms in paroxysmal atrial fibrillation].

Heart rate (HR) variations during night sleep and in the early predawn period in healthy subjects and patients with paroxisms of artrial fibrillation were used to assess HR circadian rhythms. Daily ECG monitoring was performed in 19 healthy subjects (mean age 36.0 +/- 7.05 years) and patients with paroxisms of atrial fibrillation (mean age 55.15 +/- 3.91 years). In healthy subjects, HR responsiveness during night sleep and in the early predawn hours was more prominent than in patients with paroxisms of atrial fibrillation. The number of HR spikes at night was 20.42 +/- 3.73 and 14.23 +/- 2.8 (p < 0.001) and one hour before waking 3.74 +/- 1.33 and 1.92 +/- 1.04 (p < 0.001) respectively; premorning activation coefficient was 0.19 +/- 0.007 and 0.13 +/- 0.007 (p < 0.05). It is concluded that HR responsiveness during the night sleep and the early predawn period in healthy subjects is higher than in patients with paroxisms of articular fibrillation. The number of HR spikes at night and one hour before waking as well as premorning activation coefficient can be used to assess RH circadian rhythms.