System and method for controlling implantable medical device parameters in response to atrial pressure attributes
First Claim
1. A method for controlling implantable medical device parameters, said method comprising:
- obtaining a left atrial pressure signal;
indentifying at least one attribute of said left atrial pressure signal, said at least one attribute being indicative of cardiac performance;
automatically adjusting at least one output parameter of an implantable medical device to enhance hemodynamic performance in response to said at least one attribute, said left atrial pressure signal comprising a v-wave characteristic, an a-wave characteristic, and a c-wave characteristic;
determining a v-wave peak time corresponding to said v-wave characteristic, an a-wave peak time corresponding to said a-wave characteristic, and a c-wave peak time corresponding to said c-wave characteristic; and
calculating a first time period (tva) based upon said v-wave peak time and said a-wave peak time, and a second time period (tac) based upon said a-wave peak time and said c-wave peak time, said at least one attribute corresponding to a ratio of tva and tac.
1 Assignment
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Accused Products
Abstract
In an implantable medical device a real-time left atrial pressure (“LAP”) signal obtained from a patient'"'"'s heart is used as a feedback control mechanism to adjust one or more device parameters. In one example the device identifies specific characteristics and attributes of the LAP signal that correlate to hemodynamic performance, and adjusts the device parameters to optimize the LAP characteristics and attributes. In a dual-chamber pacing system, the controlled operating parameter may include the atrioventricular pacing delay, and LAP attribute suitable for controlling the atrioventricular pacing delay time intervals of v-wave, a-wave, and/or c-wave characteristics of the LAP signal.
42 Citations
17 Claims
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1. A method for controlling implantable medical device parameters, said method comprising:
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obtaining a left atrial pressure signal; indentifying at least one attribute of said left atrial pressure signal, said at least one attribute being indicative of cardiac performance; automatically adjusting at least one output parameter of an implantable medical device to enhance hemodynamic performance in response to said at least one attribute, said left atrial pressure signal comprising a v-wave characteristic, an a-wave characteristic, and a c-wave characteristic; determining a v-wave peak time corresponding to said v-wave characteristic, an a-wave peak time corresponding to said a-wave characteristic, and a c-wave peak time corresponding to said c-wave characteristic; and calculating a first time period (tva) based upon said v-wave peak time and said a-wave peak time, and a second time period (tac) based upon said a-wave peak time and said c-wave peak time, said at least one attribute corresponding to a ratio of tva and tac. - View Dependent Claims (2, 3)
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4. A method for controlling implantable medical device parameters, said method comprising:
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obtaining a left atrial pressure signal; identifying at least one attribute of said left atrial pressure signal, said at least one attribute being indicative of cardiac performance; and automatically adjusting at least one output parameter of an implantable medical device to enhance hemodynamic performance in response to said at least one attribute, said left atrial pressure signal comprising a c-wave characteristic, and said at least one attribute comprising an amplitude of said c-wave characteristic. - View Dependent Claims (5, 6, 7, 8)
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9. A dual-chamber pacing implantable medical device comprising:
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a data collection module configured to obtain a left atrial pressure signal from a patient; a data processing module coupled to said data collection module, said data processing module being configured to identify at least one attribute of said left atrial pressure signal, and to correlate said at least one attribute to a hemodynamic status of said patient; and a therapy module coupled to said data processing module, said therapy module being configured to automatically adjust at least one output parameter of a therapy signal in response to said at least one attribute, said left atrial pressure signal comprising a c-wave characteristic, and said at least one attribute comprising an amplitude of said c-wave characteristic. - View Dependent Claims (10, 11, 12)
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13. A dual-chamber pacing implantable medical device comprising:
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a data collection module configured to obtain a left atrial pressure signal from a patient; a data processing module coupled to said data collection module, said data processing module being configured to identify at least one attribute of said left atrial pressure signal, and to correlate said at least one attribute to a hemodynamic status of said patient; and a therapy module coupled to said data processing module, said therapy module being configured to automatically adjust at least one output parameter of a therapy signal in response to said at least one attribute, said left atrial pressure signal comprising a v-wave characteristic, an a-wave characteristic, and a c-wave characteristic, said data processing module being further configured to; determine a v-wave peak time corresponding to said v-wave characteristic, an a-wave peak time corresponding to said a-wave characteristic, and a c-wave peak time corresponding to said c-wave characteristic; and calculate a first time period (tva) based upon said v-wave peak time and said a-wave peak time, and a second time period (tac) based upon said a-wave peak time and said c-wave peak time, said at least one attribute corresponding to a ratio of tva and tac.
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14. A dual-chamber pacing implantable medical device comprising:
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means for obtaining a left atrial pressure signal of a patient; means for identifying at least one attribute of said left atrial pressure signal, said at least one attribute being indicative of hemodynamic status of said patient; means for automatically adjusting at least one output parameter of a therapy signal in response to said at least one attribute, said left atrial pressure signal comprising a v-wave characteristic, an a-wave characteristic, and a c-wave characteristic; means for determining a v-wave peak time corresponding to said v-wave characteristic, an a-wave peak time corresponding to said a-wave characteristic, and a c-wave peak time corresponding to said c-wave characteristic; and means for calculating a first time period (tva) based upon said v-wave peak time and said a-wave peak time, and a second time period (tac) based upon said a-wave peak time and said c-wave peak time, said at least one attribute corresponding to a ratio of tva and tac. - View Dependent Claims (15, 16, 17)
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Specification