FIELD: medicine.
SUBSTANCE: invention can be used in cardiology, therapy, rehabilitation. The level of SDNNidx and pNN50 is determined by conducting daily monitoring of the electrocardiogram for 24 hours in patients with non-occlusive coronary atherosclerosis with preserved ejection fraction in case of suspected chronic heart failure. Upon the receipt of the SDNNidx level of 49 ms or less and pNN50 of 5% or less, the presence of chronic heart failure with preserved ejection fraction is diagnosed.
EFFECT: method improves the quality of diagnosis of chronic heart failure with preserved ejection fraction in patients with non-obstructive atherosclerosis of the coronary arteries by the level of two time domain parameters of the total heart rate variability SDNNidx and pNN50.
1 cl, 2 ex, 2 dwg, 1 tbl
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