Pericarditis as an inflammatory heart disease is rarely discussed in the cardiology community. The latest European guidelines on pericarditis were published in 2015, and Russian clinical guidelines are dated 2022. However, in recent years, a number of publications have appeared that have forced the scientific community to take a fresh look at this problem. This is mainly due to a change in the paradigm of the treatment of idiopathic recurrent pericarditis (IRP) registered in the Russian Federation as a rare (orphan) disease. According to most experts, IRP is an underestimated cardiac disease, which, due to the lack of specific symptoms and the physicians' alertness regarding the IRP diagnostics, is rarely the subject of scientific discussions. The issues of diagnosis and therapy of IRP in light of the latest reports became the matter under discussion for a group of leading Russian experts chaired by Corresponding Member of the Russian Academy of Sciences, Professor G.P. Arutyunov.