Estimating acute response to cardiac resynchronization therapy
First Claim
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1. A medical system, comprising:
- an electrode for delivering at least one pacing pulse to a pacing site of a patient'"'"'s heart during a cardiac cycle;
an energy delivery and sensing unit coupled to the electrode;
a hemodynamic sensor;
another sensor;
a memory configured to store at least a threshold that distinguishes between acute responsiveness and non-responsiveness to cardiac resynchronization therapy (CRT) for a patient population, patient population data, and a fusion algorithm; and
a controller coupled to the memory, the hemodynamic sensor, the another sensor, and the energy delivery and sensing unit, the controller configured to;
measure systolic timing intervals of a plurality of different events of the cardiac cycle derived from a plurality of signals sensed during the cardiac cycle, at least one of the plurality of signals produced by the hemodynamic sensor and indicating a systolic timing interval of a mechanical cardiac event of the plurality of different events of the cardiac cycle, and at least another of the plurality of signals produced by the another sensor,implement the fusion algorithm to combine the measured systolic timing intervals of the plurality of different events of the cardiac cycle and the patient population data to compute an estimate of probability of acute responsiveness to cardiac resynchronization therapy CRT for the pacing site,compare the estimate to the threshold, andgenerate an output indication of acute responsiveness or non-responsiveness of the pacing site to CRT based on the comparison of the estimate to the threshold.
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Abstract
Systolic timing intervals are measured in response to delivering pacing energy to a pacing site of a patient'"'"'s heart. An estimate of a patient'"'"'s acute response to cardiac resynchronization therapy (CRT) for the pacing site is determined using the measured systolic timing intervals. The estimate is compared to a threshold. The threshold preferably distinguishes between acute responsiveness and non-responsiveness to CRT for a patient population. An indication of acute responsiveness to CRT for the pacing site may be produced in response to the comparison.
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Citations
18 Claims
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1. A medical system, comprising:
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an electrode for delivering at least one pacing pulse to a pacing site of a patient'"'"'s heart during a cardiac cycle; an energy delivery and sensing unit coupled to the electrode; a hemodynamic sensor; another sensor; a memory configured to store at least a threshold that distinguishes between acute responsiveness and non-responsiveness to cardiac resynchronization therapy (CRT) for a patient population, patient population data, and a fusion algorithm; and a controller coupled to the memory, the hemodynamic sensor, the another sensor, and the energy delivery and sensing unit, the controller configured to; measure systolic timing intervals of a plurality of different events of the cardiac cycle derived from a plurality of signals sensed during the cardiac cycle, at least one of the plurality of signals produced by the hemodynamic sensor and indicating a systolic timing interval of a mechanical cardiac event of the plurality of different events of the cardiac cycle, and at least another of the plurality of signals produced by the another sensor, implement the fusion algorithm to combine the measured systolic timing intervals of the plurality of different events of the cardiac cycle and the patient population data to compute an estimate of probability of acute responsiveness to cardiac resynchronization therapy CRT for the pacing site, compare the estimate to the threshold, and generate an output indication of acute responsiveness or non-responsiveness of the pacing site to CRT based on the comparison of the estimate to the threshold. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
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18. A medical system for delivering at least one pacing pulse to a pacing site of a patient'"'"'s heart during a cardiac cycle, the system comprising:
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means for measuring systolic timing intervals of a plurality of different events of the cardiac cycle, at least one of the systolic timing intervals based on a mechanical cardiac event, the measuring means comprising at least a hemodynamic sensor and another sensor; means for storing patient population data; means for implementing a fusion algorithm to combine the measured systolic timing intervals of the plurality of different events of the cardiac cycle and the patient population data to compute an estimate of acute responsiveness to cardiac resynchronization therapy (CRT); means for comparing the estimate to a threshold, the threshold distinguishing between acute responsiveness and non-responsiveness to CRT for a patient population; and means for producing an indication of acute responsiveness to CRT for the pacing site in response to the comparison.
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Specification