For citations:
Loginova E.N., Nechaeva G.I., Dakuko A.N., Bogatyrev I.V., Potapov V.V., Sharun I.V. Left ventricular longitudinal strain in patients with undifferentiated connective tissue disease and arrhythmia. Russian Journal of Cardiology. 2023;28(12):5665. (In Russ.) https://doi.org/10.15829/1560-4071-2023-5665. EDN: MGBUSC