Systems and methods for valvular regurgitation detection
First Claim
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1. A system comprising:
- an implantable medical device (IMD) comprising;
an implantable sensor operable to produce an electrical signal representative of mechanical activity of a heart of a subject; and
a controller circuit coupled to the sensor, wherein the controller circuit includes;
a wavelet filter module including a wavelet filter, the wavelet filter module, configured to;
generate a set of time-frequency representations of the electrical signal; and
produce a wavelet filtered electrical signal using the set of time-frequency representations; and
a valvular regurgitation (VR) calculation module configured to calculate a measurement of VR for one or more heartbeats using a measurement of systolic energy of the wavelet filtered electrical signal during systole and a measurement of diastolic energy of the wavelet filtered electrical signal during diastole.
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Abstract
A system comprising an implantable medical device (IMD). The IMD includes an implantable sensor operable to produce an electrical signal representative of mechanical activity of a heart of a subject and a controller circuit coupled to the sensor. The controller circuit includes a wavelet filter module and a valvular regurgitation (VR) calculation module. The wavelet filter module is configured to extract signal energy information from the electrical signal. The energy information includes variation of signal amplitude with frequency and time. The VR calculation module is configured to calculate a measurement of VR for one or more heartbeats using the energy information.
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Citations
35 Claims
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1. A system comprising:
an implantable medical device (IMD) comprising; an implantable sensor operable to produce an electrical signal representative of mechanical activity of a heart of a subject; and a controller circuit coupled to the sensor, wherein the controller circuit includes; a wavelet filter module including a wavelet filter, the wavelet filter module, configured to; generate a set of time-frequency representations of the electrical signal; and produce a wavelet filtered electrical signal using the set of time-frequency representations; and a valvular regurgitation (VR) calculation module configured to calculate a measurement of VR for one or more heartbeats using a measurement of systolic energy of the wavelet filtered electrical signal during systole and a measurement of diastolic energy of the wavelet filtered electrical signal during diastole. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
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18. A system comprising:
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an implantable medical device (IMD) comprising; an implantable sensor operable to produce an electrical signal representative of mechanical activity of a heart of a subject; a sampling circuit coupled to the sensor circuit to produce digital representations of the electrical signal; a communication circuit; and a controller circuit coupled to the communication circuit and the sampling circuit, the controller circuit operable to communicate the digital representations; and an external device comprising; a communication circuit operable to communicate information with the IMD, the information including the digital representations; a processor coupled to the communication circuit, the processor including; a wavelet filter module including a wavelet filter, the wavelet filter module configured to; generate a set of time-frequency representations of the electrical signal; and produce a wavelet filtered electrical signal using the set of time-frequency representations; and a valvular regurgitation (VR) module configured to calculate a measurement of VR for one or more heartbeats using a ratio of a measurement of systolic energy of the wavelet filtered electrical signal during systole to a measurement of diastolic energy of the wavelet filtered electrical signal during diastole. - View Dependent Claims (19, 20, 21, 22, 23, 24, 25)
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26. A method comprising:
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sensing an electrical signal representative of mechanical activity of a heart of a subject using an implantable medical device; generating a set of time-frequency representations of the electrical signal producing a wavelet filtered electrical signal using the set of time-frequency representations; and calculating a measurement of valvular regurgitation (VR) for one or more heartbeats using a ratio of a measurement of systolic energy of the wavelet filtered electrical signal during systole to a measurement of diastolic energy of the wavelet filtered electrical signal during diastole. - View Dependent Claims (27, 28, 29, 30, 31, 32, 33, 34, 35)
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Specification