any disturbances of the regularity or frequency of the heart rhythm, as well as the electrical conductivity of the heart. Arrhythmias may be asymptomatic or palpitations, palpitations, or palpitations may be felt. Sometimes arrhythmias are accompanied by dizziness, fainting, pain in the heart, shortness of breath. Arrhythmias are detected during physical and instrumental diagnostics (cardiac auscultation, EKG, PPEKG, Holter monitoring, stress tests). In the treatment of various types of arrhythmias, drug therapy and heart surgery methods (RFA, electric pacemaker, installation of a cardioverter-defibrillator) are used.