XIII International Congress on electrostimulation and clinical electrophysiology of the heart "Cardiostim-2018" took place in St. Petersburg. Surgical treatment of complex disorders of heart rhythm and conduction was discussed in the congress. The Northern capital of Russia unites specialists engaged in diagnosis and treatment of rhythm disorders: cardiologists, arrhythmologists, cardiac surgeons, specialists in endovascular methods of diagnosis and treatment, doctors of functional diagnostics, emergency doctors for a quarter of century.