SYSTEM, STETHOSCOPE AND METHOD FOR DETECTION OF RISK OF ISCHEMIC HEART DISEASE Russian patent published in 2015 - IPC A61B7/04 A61B5/02 G06F17/00 

FIELD: medicine.

SUBSTANCE: group of invention refers to medicine. A method for detecting a heart tone signal strength to diagnose ischemic heart disease (IHD) is implemented by means of a system for low-frequency power detection. Acoustic data are recorded by means of an acoustic sensor placed on a patient's chest, and acoustic signals S_A are generated. Diastolic and systolic periods are identified in a pre-set period of time of the saved acoustic data, and a period signal S_P is formed. The signal S_P is filtered; a low frequency band signal S_LFB and a high frequency band signal S_HFB are formed. A low frequency band power is evaluated and reduced to the other higher-frequency band. A low frequency power is calculated on the basis of the evaluated and reduced powers, and a low frequency signal S_LFP is formed. A high frequency band characteristic is evaluated; a high frequency characteristic is calculated on the basis of the evaluated characteristics, and a high frequency signal S_HFF is formed; the above characteristic is power. The low frequency and high frequency powers are combined, and a resultant combined power ratio is compared to IHD reference to form a combined IHD risk signal S'_CAD.

EFFECT: using the inventions enables providing more accurate IHD diagnosing.

16 cl, 12 dwg