Abstract: The proposed technology relates to a method for indicating a risk for coronary artery disease. A sound recording is obtained (100) covering a plurality of heartbeats, a plurality of heart sounds are identified (200) in the sound recording, and a plurality of segments are obtained (300) from the sound recording. A frequency power measure is determined (400) based on the signal strength of a first frequency window of a period in the diastole, an amplitude of the fourth heart sound is determined (500) based on the plurality of heart sounds and the plurality of segments, and an indication of a heart rate variability is determined (600) based on the plurality of heart sounds. The indication of the risk for coronary artery disease is then determined (700) based on the frequency power measure, the amplitude of the fourth heart sound, and the indication of the heart rate variability.

Abstract: The proposed technology relates to a method for indicating a risk for coronary artery disease. A sound recording is obtained (100) covering a plurality of heartbeats, a plurality of heart sounds are identified (200) in the sound recording, and a plurality of segments are obtained (300) from the sound recording. A frequency power measure is determined (400) based on the signal strength of a first frequency window of a period in the diastole, an amplitude of the fourth heart sound is determined (500) based on the plurality of heart sounds and the plurality of segments, and an indication of a heart rate variability is determined (600) based on the plurality of heart sounds. The indication of the risk for coronary artery disease is then determined (700) based on the frequency power measure, the amplitude of the fourth heart sound, and the indication of the heart rate variability.

Abstract: The invention relates to a monitoring system (1) for monitoring acoustic heart signals, comprising a sensor housing (2) comprising a heart sound sensing element (3) adapted to be arranged in connection to a patient's heart to sense heart sounds and to generate a heart sound signal related to the heart sounds; a monitoring unit housing (4) comprising a processing unit (5) adapted to receive said heart sound signal, wherein said monitoring unit housing (4) is separated from said sensor housing (2) and is adapted to be arranged in relation to the patient's upper sternum, wherein the monitoring system (1) further comprises a flexible elongated connector (6) connecting said sensor housing (2) to said monitoring unit housing (4), said connector (6) having a longitudinal extension along a longitudinal axis (7), wherein said connector (6) is connected to said monitoring unit housing (4) in an angular relationship, and wherein the angle ? between said longitudinal axis (7) and a main axis (8) of said monitoring unit h

Abstract: An adhesive patch for monitoring acoustic signals from a human or animal body, comprising a skin contact surface, converting means for recording both body acoustic signals and environmental acoustic noise, reducing the body signals by the recorded noise, and providing a first electric output signal. The patch also comprising an adhesive element and a compression structure for attaching the converting means to the skin surface. The patch further comprises transmitting means for transmitting the output signal to a peripheral device.

Abstract: A system and method for diagnosing coronary artery disease (CAD) comprises an acoustic sensor to be placed on the chest of a patient to generate acoustic signals SA: a control unit adapted to receive said acoustic signals SA, the control unit comprising: an identification unit to identify diastolic or systolic periods in a predetermined time period and to generate a period signal SP; a filtering unit adapted to apply a filter to said identified periods to generate a low frequency band signal SLFB and a high frequency band signal SHFB of said identified periods; and a calculation unit, to calculate a low frequency power measure SLFP and a high frequency feature measure SHFF. A risk-determining unit provides a risk-of-CAD signal based on the low frequency power measure and the high frequency feature measure. The invention also relates to a stethoscope and a method for detection of low frequency power.

Abstract: A system and method for diagnosing coronary artery disease (CAD) comprises an acoustic sensor to be placed on the chest of a patient to generate acoustic signals SA: a control unit adapted to receive said acoustic signals SA, the control unit comprising: an identification unit to identify diastolic or systolic periods in a predetermined time period and to generate a period signal SP; a filtering unit adapted to apply a filter to said identified periods to generate a low frequency band signal SLFB and a high frequency band signal SHFB of said identified periods; and a calculation unit, to calculate a low frequency power measure SLFP and a high frequency feature measure SHFF. A risk-determining unit provides a risk-of-CAD signal based on the low frequency power measure and the high frequency feature measure. The invention also relates to a stethoscope and a method for detection of low frequency power.

Abstract: A system for detection of frequency power for diagnosing coronary artery disease (CAD), comprising: an acoustic sensor to be placed on the chest of a patient to generate acoustic signals SA: a memory adapted to store acoustic signals SA; a control unit adapted to receive said acoustic signals SA; the control unit comprising: an identification unit to identify diastolic or systolic periods in a predetermined time period and to generate a period signal SP, a filtering unit adapted to apply a filter to said identified periods to generate a low frequency band signal SLFB indicating low frequency bands of identified periods; a calculation unit to estimate the power in said low frequency band of identified periods, to calculate a low frequency power measure and to generate a low frequency power measure signal SLFP. The invention also relates to a stethoscope and a method for detection of low frequency power.

Abstract: The invention relates to a monitoring system (1) for monitoring acoustic heart signals, comprising a sensor housing (2) comprising a heart sound sensing element (3) adapted to be arranged in connection to a patient's heart to sense heart sounds and to generate a heart sound signal related to the heart sounds; a monitoring unit housing (4) comprising a processing unit (5) adapted to receive said heart sound signal, wherein said monitoring unit housing (4) is separated from said sensor housing (2) and is adapted to be arranged in relation to the patient's upper sternum, wherein the monitoring system (1) further comprises a flexible elongated connector (6) connecting said sensor housing(2) to said monitoring unit housing(4), said connector (6) having a longitudinal extension along a longitudinal axis(7), wherein said connector (6) is connected to said monitoring unit housing(4) in an angular relationship, and wherein the angle ? between said longitudinal axis (7) and a main axis (8) of said monitoring unit housi

Abstract: An adhesive patch for monitoring acoustic signals from a human or animal body, comprising a skin contact surface, converting means for recording both body acoustic signals and environmental acoustic noise, reducing the body signals by the recorded noise, and providing a first electric output signal. The patch also comprising an adhesive element and a compression structure for attaching the converting means to the skin surface. The patch further comprises transmitting means for transmitting the output signal to a peripheral device.

Abstract: An adhesive patch for monitoring acoustic signals from a human or animal body, comprising a skin contact surface, converting means for recording the acoustic signals and converting it to a first electric output signal, and an adhesive element for attaching the converting means to the skin surface, the patch further comprises transmitting means for transmitting the output signal to a peripheral device.

Abstract: A method, system, stethoscope and server for classifying a cardiovascular sound recorded from a living subject. The method comprises the steps of: identifying diastolic and/or systolic segments of the cardiovascular sound; dividing at least one of the identified diastolic and/or systolic segments into a number of sub-segments comprising at least a first sub-segment and at least a second sub-segment; extracting from the first sub-segment at least a first signal parameter characterizing a first property of the cardiovascular sound, extracting from the second sub-segment at least a second signal parameter characterizing a second property of the cardiovascular sound; and classifying the cardiovascular sound using the at least first signal parameter and the at least second signal parameter in a multivariate classification method.

Abstract: This invention describes a method for dividing a substantial cycli cardiovascular signal into segments by determining the characteristics of said cyclic signal, wherein each cycle in said signal comprises at least two characteristic segments and wherein the method comprises the steps o identifying segments in a cycle based on prior knowledge of said segment characteristics and the step of verifying said identified segments based on a number of statistical parameters obtained from prior knowledge relating to said cyclic signal. Furthermore, the invention describes a system adapted to perform the above-described method.

Abstract: The invention relates to segmentation of cardiac acoustic signals, such as the heart sound signal, based on statistical algorithms. A duration-dependent Hidden Markov Model is disclosed which models the shifting states of the heart, based on the cardiac acoustic signal and the time spent in the given states relating to physiological events, e.g. the various states of the heart during the heart beat cycle.

Abstract: An adhesive patch for monitoring acoustic signals from a human or animal body, comprising a skin contact surface, converting means for recording the acoustic signals and converting it to a first electric output signal, and an adhesive element for attaching the converting means to the skin surface, the patch further comprises transmitting means for transmitting the output signal to a peripheral device.