Methods and devices for determining exercise diagnostic parameters
First Claim
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1. In an implantable cardiac device, a method for determining workload of a patient during exercise, comprising:
- (a) monitoring a changing heart rate of the patient and producing heart rate measurements;
(b) monitoring activity level of the patient; and
(c) determining workload of the patient using at least one heart rate measurement when the activity level exceeds an activity threshold.
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Abstract
A device, such as an implantable cardiac device, and methods for determining exercise diagnostic parameters of a patient are disclosed. Specifically, a maximum observed heart rate of a patient during exercise can be identified when an activity level and a heart rate measurement of the patient exceed predetermined thresholds. Included are methods for filtering out premature heartbeats or noise from the maximum heart rate determination. Methods of determining other exercise parameters, such as workload are also disclosed. The device includes hardware and/or software for performing the described methods.
65 Citations
14 Claims
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1. In an implantable cardiac device, a method for determining workload of a patient during exercise, comprising:
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(a) monitoring a changing heart rate of the patient and producing heart rate measurements; (b) monitoring activity level of the patient; and (c) determining workload of the patient using at least one heart rate measurement when the activity level exceeds an activity threshold. - View Dependent Claims (2, 3, 4)
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5. An implantable cardiac device for determining workload of a patient during exercise, comprising:
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means for monitoring a changing heart rate of the patient and producing heart rate measurements; means for monitoring activity level of the patient; means for determining work of the patient using at least one heart rate measurement when the activity level exceeds an activity threshold; and means for transmitting the work of the patient to an external device.
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6. A computer readable medium having instructions that when executed on a processor of an implantable medical device (IMD) have cardiac pacing capabilities cause the IMD to:
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(a) monitor a changing heart rate of the patient and produce heart rate measurements; (b) monitor activity level of the patient; and (c) determine workload of the patient using at least one heart rate measurement when the activity level exceeds an activity threshold, wherein workload is calculated as the product of heart rate intensity and duration, wherein duration is the period of time during which the activity level exceeds an activity threshold. - View Dependent Claims (7, 8, 9, 10, 11, 12, 13, 14)
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Specification