Detection of coronary artery disease using an electronic stethoscope
First Claim
1. A system for detecting coronary artery disease comprising:
- at least one vibration sensor configured to be placed over a patient'"'"'s chest to obtain vibration data in a frequency range below about 100 Hz;
a memory configured to store the vibration data from the at least one vibration sensor; and
at least one processor configured toprocess the vibration data to obtain processed data,detect a bell shaped curve within the processed data,determine an onset frequency of the bell shaped curve,determine a downslope frequency of the bell shaped curve,determine a peak of the bell shaped curve at a peak frequency that is between the onset frequency and the downslope frequency, andprovide an output related to a presence or absence of at least 50 percent to 99 percent coronary artery stenosis based on the onset frequency, the downslope frequency, and the peak.
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Accused Products
Abstract
The disclosure describes an electronic stethoscope system that automatically detects coronary artery disease in patients. The system uses an electronic stethoscope to record acoustic data from the fourth left intercostal space of a patient. A processing technique is then applied in order to filter the data and produce Fast Fourier Transform (FFT) data of magnitude versus frequency. If a bell curve is identified in the data between a predefined frequency range (e.g., 50 and 80 Hz) with a peak magnitude of greater than a predefined threshold (e.g., 2.5 units), the system automatically provides an output indicating that the patient is likely to have 50 to 99 percent stenosis of the coronary artery. If no bell curve is present, the patient may have artery stenosis of less than 50 percent. An interface module may be used to transfer diagnosis information to the stethoscope and data to a general purpose computer. This inexpensive and quick system may improve the chances for early detection and patient survival of coronary artery disease.
236 Citations
13 Claims
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1. A system for detecting coronary artery disease comprising:
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at least one vibration sensor configured to be placed over a patient'"'"'s chest to obtain vibration data in a frequency range below about 100 Hz; a memory configured to store the vibration data from the at least one vibration sensor; and at least one processor configured to process the vibration data to obtain processed data, detect a bell shaped curve within the processed data, determine an onset frequency of the bell shaped curve, determine a downslope frequency of the bell shaped curve, determine a peak of the bell shaped curve at a peak frequency that is between the onset frequency and the downslope frequency, and provide an output related to a presence or absence of at least 50 percent to 99 percent coronary artery stenosis based on the onset frequency, the downslope frequency, and the peak. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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Specification