Professor Leonida Gherasim, MD, PhD, is a member of the Romanian Academy. We invited him to write the editorial review for this issue. The subject - how to treat the silent atrial fibrillation (that fibrillation discovered only by devices) and take the decision to anti coagulate or not - is a very important clinical judgement. Professor Gherasim was the editor of several editions of the Romanian Handbook of Internal Medicine - the Romanian equivalent of Harrison's, or Cecil and Loeb's Handbooks. He remains one of the most outstanding professors of internal medicine in Romania. In 2019, professor Leonida Gherasim will be 90 years old. Prof. Mircea Cinteza Chief Editor, MAEDICA J Clin Med.