For citations:
Kononenko O.V., Zenin S.A., Fedoseenko A.V., Felikov I.M., Pyataeva O.V., Ermolaeva M.S. Acquired long QT syndrome, manifesting in the first complex after a ventricular extrasystole. Journal of Arrhythmology. 2021;28(2):37-43. (In Russ.) https://doi.org/10.35336/VA-2021-2-37-43