Heart valve abnormality detection device, non-transitory recording medium, and detection method

A device for detecting an abnormality in a heart valve by processing heart sound data corresponding to heart sounds, the device comprising:

• a first processing unit configured to set, based on the heart sound data, a section between a first heart sound and a second heart sound of the heart sounds as a target range and acquire a peak frequency that is a peak value of a frequency in a frequency component of the heart sounds having an intensity equal to or greater than a reference intensity within the target range;
• an ejection time acquisition unit configured to acquire an ejection time based on the heart sound data;
• and
• a second processing unit configured to output a detection signal indicating a degree of the abnormality in the heart valve based on a result of comparison between the peak frequency and a set frequency range and a result of comparison between the ejection time and an ejection reference value.

A non-transitory recording medium storing a computer readable program used in a computer, the computer readable program causing the computer to perform processing comprising:

• first processing for acquiring heart sound data corresponding to heart sounds;
• second processing for setting, based on the heart sound data, a section between a first heart sound and a second heart sound of the heart sounds as a target range and acquire a peak frequency that is a peak value of a frequency in a frequency component of the heart sounds within the target range;
• and
• third processing for outputting a detection signal indicating that there is a high probability of severe aortic stenosis in a case where the peak frequency is a peak reference value or greater.

A method for detecting an abnormality in a heart valve by processing heart sound data corresponding to heart sounds, the method comprising:

• performing first processing of setting, based on the heart sound data, a section between a first heart sound and a second heart sound of the heart sounds as a target range and acquiring a peak frequency that is a peak value of a frequency in a frequency component of the heart sounds having an intensity equal to or greater than a reference intensity within the target range;
• performing ejection time acquisition processing of acquiring an ejection time based on the heart sound data;
• and
• performing second processing of outputting a detection signal indicating a degree of the abnormality in the heart valve based on a result of comparison between the peak frequency and a set frequency range and a result of comparison between the ejection time and an ejection reference value.