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Syvolap, V. V.; Lysenko, V. A. Is There the Phenotype of Chronic Heart Failure With “intermediate” Left Ventricular Ejection Fraction? Additional Echocardiographic Criteria for Left Ventricular Systolic Dysfunction in Patients With Chronic Heart Failure of Ischemic Origin With Ejection Fraction in the “gray area.” Zaporozhye Medical Journal 2021, 23, 322-330.