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US 7,404,802 B2Granted
Trending of systolic murmur intensity for monitoring cardiac disease with implantable device
AssigneeCardiac Pacemakers, Inc.
InventorsKrzysztof Z. Siejko, Richard Fogoros
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Abstract
Described is an implantable device configured to monitor for changes in the intensity and/or duration of a systolic murmur such as mitral regurgitation by means of an acoustic sensor. Such changes may be taken to indicate a change in a patient's heart failure status. Upon detection of a worsening in the patient's heart failure statue, the device may be programmed to alert clinical personnel over a patient management network and/or make appropriate adjustments to pacing therapy.
Claims18
An implantable cardiac device, comprising:
- a pressure sensor adapted for disposition in the pulmonary artery of a patient in order to measure pulmonary artery pressure;
- means for obtaining an intensity measurement of a systolic murmur;
- and,
- a controller programmed to measure a current murmur intensity as an average of intensity measurements taken over some period of time, record a baseline murmur intensity, compare the current murmur intensity to the baseline murmur intensity, and set an alarm flag if the current murmur intensity exceeds the baseline murmur intensity by a first specified threshold amount and if the pulmonary artery pressure exceeds a second specified threshold amount.
1 more element
A method, comprising:
- measuring the intensity of a systolic murmur and recording a baseline murmur intensity;
- measuring the pulmonary artery pressure;
- and,
- measuring a current murmur intensity as an average of intensity measurements taken over some period of time, comparing the current murmur intensity to the baseline murmur intensity, and setting an alarm flag if the current murmur intensity exceeds the baseline murmur intensity by a first specified threshold amount and the measured pulmonary artery pressure exceeds a second specified threshold amount.
1 more element
Dependencies are inferred from the claim text.