PREDICTORS OF POSITIVE STEPS IN THE FIVE-STEP STRESS ECHOCARDIOGRAPHY PROTOCOL IN PATIENTS WITH POSTINFARCTION CARDIOSCLEROSIS ArticleTimofeeva T.M., Safarova A.F., Pavlikov G.S., Vladelshchikova D.N., Kobalava Z.D.Bulletin of Siberian Medicine. Том 24. 2025. С. 105-115