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, comprising:
- identifying, by a medical device, a point within a derivative signal of a cardiovascular pressure signal without reference to electrical activity of a heart;
initiating, by the medical device, a time window from the identified point in the derivative signal;
identifying, with the medical device, a point within the cardiovascular signal within the time window; and
determining, with the medical device, at least one of a systolic pressure or diastolic pressure based on the identified point.
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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.
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Citations
24 Claims
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1. A method of monitoring a cardiovascular pressure signal in a medical device, comprising:
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identifying, by a medical device, a point within a derivative signal of a cardiovascular pressure signal without reference to electrical activity of a heart; initiating, by the medical device, a time window from the identified point in the derivative signal; identifying, with the medical device, a point within the cardiovascular signal within the time window; and determining, with the medical device, at least one of a systolic pressure or diastolic pressure based on the identified point. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A medical device system for monitoring a cardiovascular pressure signal, comprising:
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at least one pressure sensor to generate a cardiovascular pressure signal; and at least one pressure analysis module 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 from the identified point in the derivative signal; identify a point within the cardiovascular signal within the time window; and determine at least one of a systolic pressure or diastolic pressure based on the identified point. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16)
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17. A computer-readable storage medium comprising instructions that, when executed, cause a cardiovascular pressure analysis module of a medical device to:
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identify a point within a derivative signal of a cardiovascular pressure signal without reference to electrical activity of a heart; initiate a time window from the identified point in the derivative signal; identify a point within the cardiovascular signal within the time window; and determine at least one of a systolic pressure or diastolic pressure based on the identified point. - View Dependent Claims (18, 19, 20, 21, 22, 23, 24)
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Specification