[Myopericaditis as a late manifestation of the probable COVID-19].

The article describes a clinical case of myopericarditis as a late manifestation of possible COVID-19.

[Role of atrial structural and functional changes in the development and progression of atrial fibrillation].

Atrial fibrillation (AF) is one of the most common reasons for decreased life quality and increased mortality rates. Experimental and clinical data show that atrial structural and functional changes contribute to the development and progression of AF. The survey article considers the role of the systemic and local activities of the renin-angiotensin-aldosterone system and inflammatory mediators in the development of atrial structural remodeling, which may be a cause and a consequence of AF.

[Atrial fibrillation as consequence and cause of structural changes of atria].

Changes of atrial structure and function are the contributors of atrial fibrillation clinical course, complications and treatment effectiveness. Effects of inflammation and mechanical stretch on atrial structural remodeling leading to atrial fibrillation are reviewed in the article. Contemporary invasive and non-invasive methods of evaluation (including late gadolinium enhancement magnetic resonance imaging) of patients with atrial structural remodeling in atrial fibrillation are also described.