Measurement of cardiac cycle length and pressure metrics from pulmonary arterial pressure
First Claim
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1. A method of monitoring a cardiovascular pressure signal in a medical device, the method comprising:
- identifying, by a medical device, a point within a derivative signal of the cardiovascular pressure signal without reference to electrical activity of a heart;
initiating, by the medical device, a time window extending backward in time from the identified point in the derivative signal;
identifying, by the medical device, a point within the cardiovascular pressure signal and within the time window; and
determining, by the medical device, a diastolic pressure based on the identified point within the cardiovascular pressure signal.
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Abstract
Various techniques for measuring cardiac cycle length and pressure metrics based on pulmonary artery pressures are described. One example method described includes identifying a point within a derivative signal of a cardiovascular pressure signal without reference to electrical activity of a heart, initiating a time window from the identified point in the derivative signal, identifying a point within the cardiovascular signal within the time window, and determining at least one of a systolic pressure or diastolic pressure based on the identified point.
60 Citations
29 Claims
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1. A method of monitoring a cardiovascular pressure signal in a medical device, the method comprising:
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identifying, by a medical device, a point within a derivative signal of the cardiovascular pressure signal without reference to electrical activity of a heart; initiating, by the medical device, a time window extending backward in time from the identified point in the derivative signal; identifying, by the medical device, a point within the cardiovascular pressure signal and within the time window; and determining, by the medical device, a diastolic pressure based on the identified point within the cardiovascular pressure signal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 18, 19, 29)
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8. A medical device system for monitoring a cardiovascular pressure signal, the system comprising:
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at least one pressure sensor to generate the cardiovascular pressure signal; and processing circuitry configured to; identify a point within a derivative signal of the cardiovascular pressure signal without reference to electrical activity of a heart; initiate a time window extending backward in time from the identified point in the derivative signal; identify a point within the cardiovascular pressure signal and within the time window; and determine a diastolic pressure based on the identified point within the cardiovascular pressure signal. - View Dependent Claims (9, 10, 11, 12, 13, 14, 20)
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15. A computer-readable storage medium comprising instructions that, when executed, cause a processor of a medical device to:
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identify a point within a derivative signal of the cardiovascular pressure signal without reference to electrical activity of a heart; initiate a time window extending backward in time from the identified point in the derivative signal; identify a point within the cardiovascular pressure signal and within the time window; and determine a diastolic pressure based on the identified point within the cardiovascular pressure signal. - View Dependent Claims (16, 17)
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21. A system for monitoring a cardiovascular pressure signal, the system comprising:
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at least one implantable pressure sensor configured to be implanted within a pulmonary artery and generate the cardiovascular pressure signal indicative of fluid pressure in the pulmonary artery; and an implantable medical device distinct from the at least one implantable pressure sensor and comprising processing circuitry configured to; receive the cardiovascular pressure signal from the at least one implantable pressure sensor; identify a point within a derivative signal of the cardiovascular pressure signal without reference to electrical activity of a heart; initiate a time window extending backward in time from the identified point in the derivative signal; identify a point within the cardiovascular pressure signal and within the time window; and determine a diastolic pressure based on the identified point within the cardiovascular pressure signal. - View Dependent Claims (22)
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23. A method of monitoring a pulmonary artery pressure signal, the method comprising:
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receiving, by an implantable medical device and via wireless communication, the pulmonary artery pressure signal from an implantable pressure sensor implanted within a pulmonary artery; identifying, by the implantable medical device, a point within a derivative signal of a pulmonary artery pressure signal without reference to electrical activity of a heart; initiating, by the implantable medical device, a time window extending backward in time from the identified point in the derivative signal; identifying, by the implantable medical device, a point within the pulmonary artery pressure signal and within the time window; and determining, by the implantable medical device, diastolic pressure based on the identified point within the pulmonary artery pressure signal. - View Dependent Claims (24)
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25. A method of monitoring a pulmonary artery pressure signal, the method comprising:
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identifying, by a medical device, a point within a derivative signal of the pulmonary artery pressure signal without reference to electrical activity of a heart, the pulmonary artery pressure generated by an implantable pressure sensor comprising a processor and disposed within the pulmonary artery, wherein the implantable pressure sensor is distinct from the medical device; initiating, by the medical device, a time window from the identified point in the derivative signal; identifying, by the medical device, a point within the pulmonary artery pressure signal and within the time window; and determining, by the medical device, at least one of a systolic pressure or diastolic pressure based on the identified point within the pulmonary artery pressure signal. - View Dependent Claims (26, 27, 28)
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Specification