Safety pacing in multi-site CRM devices
First Claim
Patent Images
1. A method, comprising:
- sensing a first cardiac signal from a first cardiac region and a second cardiac signal from a second cardiac region;
pacing the first cardiac region to maintain at least a minimum cardiac rate; and
pacing the second cardiac region to maintain at least the minimum cardiac rate when a pace in the first cardiac region is inhibited.
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Abstract
Safety pacing in multi-site cardiac rhythm management (CRM) devices is provided. According to various method embodiments, a first cardiac signal from a first cardiac region and a second cardiac signal from a second cardiac region are sensed. The first cardiac region is paced to maintain at least a minimum cardiac rate, and the second cardiac region is paced to maintain at least the minimum cardiac rate when a pace in the first cardiac region is inhibited. Other aspects and embodiments are provided herein.
129 Citations
24 Claims
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1. A method, comprising:
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sensing a first cardiac signal from a first cardiac region and a second cardiac signal from a second cardiac region; pacing the first cardiac region to maintain at least a minimum cardiac rate; and pacing the second cardiac region to maintain at least the minimum cardiac rate when a pace in the first cardiac region is inhibited. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A method, comprising:
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sensing a first cardiac signal from a first cardiac region and a second cardiac signal from a second cardiac region; detecting cardiac events in the second cardiac signal; determining a cardiac rate from the cardiac events in the second cardiac signal; providing pacing pulses to the first cardiac region to maintain the cardiac rate at at least a minimum rate value; detecting an intrinsic cardiac contraction in the first cardiac signal and the second cardiac signal; starting a pace protection interval after the intrinsic cardiac event in the first cardiac signal and a cardiac cycle escape time interval after the intrinsic cardiac event in the second cardiac signal; inhibiting a pacing pulse to the first cardiac region during the pace protection interval; analyzing the second cardiac signal to detect a subsequent intrinsic cardiac event during the cardiac cycle escape time interval; and if the subsequent intrinsic cardiac event is not detected during the cardiac cycle escape time interval, delivering a pacing pulse to the second cardiac site at the end of the cardiac cycle escape time interval. - View Dependent Claims (13, 14, 15)
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16. A method, comprising:
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sensing a first cardiac signal from a first cardiac region and a second cardiac signal from a second cardiac region; detecting cardiac events in the second cardiac signal; determining a cardiac rate from the cardiac events in the second cardiac signal; providing pacing pulses to the first cardiac region to maintain the cardiac rate at at least a minimum rate value; identifying a paced cardiac event in the first cardiac signal and the second cardiac signal; starting a pace protection interval after the paced cardiac event in the first cardiac signal and a cardiac cycle escape time interval after the paced cardiac event in the second cardiac signal; inhibiting a pacing pulse to the first cardiac region during the pace protection interval; analyzing the second cardiac signal to detect an intrinsic cardiac event during the cardiac cycle escape time interval; and if the subsequent intrinsic cardiac event is not detected during the cardiac cycle escape time interval, delivering a pacing pulse to the second cardiac site at the end of the cardiac cycle escape time interval. - View Dependent Claims (17, 18, 19)
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20. A method, comprising:
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monitoring a first cardiac signal from a first cardiac region and a second cardiac signal from a second cardiac region; setting a cardiac cycle escape time interval when a cardiac event occurs in the second cardiac region; if a cardiac event is detected in the second region during the cardiac cycle escape time interval, resetting the cardiac cycle escape time interval; if a cardiac event is not detected in the first region and the second region by the end of the cardiac cycle escape time interval, providing a pacing pulse to the first cardiac region to maintain a minimum cardiac rate, and resetting the cardiac cycle escape time interval; and if a cardiac event is detected in the first region but not in the second region, starting a pacing protection interval in the first cardiac signal and monitoring the second cardiac signal from a second cardiac region, and providing a pacing pulse to maintain the minimum cardiac rate and resetting the cardiac cycle escape time interval, including; providing a pacing pulse to the second cardiac region to maintain the minimum cardiac rate if a pacing protection interval in the first cardiac signal has not expired, and resetting the cardiac cycle escape time interval; and providing a pacing pulse to the first cardiac region to maintain the minimum cardiac rate if the pacing protection interval in the first cardiac signal has expired. - View Dependent Claims (21, 22, 23, 24)
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Specification