For citations:
Fedulaev Yu.N., Makarova I.V., Pinchuk T.V., Babaev A.V., Bilich A.G., Mokhov A.E., Shoshina I.N. Fragmentation of narrow QRS complex of sinus origin in patients with postinfarction cardiosclerosis as prognostic criterion for course of coronary heart disease. Medical alphabet. 2019;1(9):20-25. (In Russ.) https://doi.org/10.33667/2078-5631-2019-1-9(384)-20-25