Safety pacing in multi-site CRM devices
First Claim
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1. A method, comprising:
- determining a cardiac rate;
providing pacing pulses to a first cardiac region to maintain the cardiac rate at least a minimum rate value;
starting a pace protection interval after a cardiac event in the first cardiac region;
inhibiting a pacing pulse to the first cardiac region during the pace protection interval; and
providing the pacing pulse to a second cardiac region at a safety interval timed from the inhibited pacing pulse to the first cardiac region.
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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.
125 Citations
31 Claims
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1. A method, comprising:
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determining a cardiac rate; providing pacing pulses to a first cardiac region to maintain the cardiac rate at least a minimum rate value; starting a pace protection interval after a cardiac event in the first cardiac region; inhibiting a pacing pulse to the first cardiac region during the pace protection interval; and providing the pacing pulse to a second cardiac region at a safety interval timed from the inhibited pacing pulse to the first cardiac region. - View Dependent Claims (2, 3, 4, 12, 13)
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5. A method, comprising:
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pacing a first cardiac region to maintain the cardiac rate at least a minimum rate value; detecting a first cardiac event in the first cardiac region; initiating a pace protection interval after the first cardiac event; inhibiting pacing to the first cardiac region during the pace protection interval; and pacing a second cardiac region to maintain the cardiac rate at least the minimum rate value in response to inhibiting pacing to the first cardiac region during the pace protection interval. - View Dependent Claims (6, 7)
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8. A method, comprising:
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determining a cardiac rate from a second cardiac region; providing pacing pulses to a first cardiac region to maintain the cardiac rate at least a minimum rate value; identifying a paced cardiac event in the first cardiac region and the second cardiac region; starting a pace protection interval after the paced cardiac event in the first cardiac region and a cardiac cycle escape time interval after the paced cardiac event in the second cardiac region; inhibiting a pacing pulse to the first cardiac region during the pace protection interval; and if a subsequent intrinsic cardiac event is not detected in the second cardiac region during the cardiac cycle escape time interval, delivering a pacing pulse to the second cardiac region at the end of the cardiac cycle escape time interval. - View Dependent Claims (9, 10)
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11. A method, comprising:
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pacing a first cardiac region to maintain at least a minimum cardiac rate; and pacing a second cardiac region to maintain at least the minimum cardiac rate when a pace in the first cardiac region is inhibited, wherein pacing a first cardiac region includes pacing a first ventricular chamber, and pacing a second cardiac region includes pacing a second ventricular chamber.
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14. A method, comprising:
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pacing a first cardiac region to maintain at least a minimum cardiac rate; and pacing a second cardiac region to maintain at least the minimum cardiac rate when a pace in the first cardiac region is inhibited, wherein pacing a first cardiac region includes pacing a first atrial chamber, and pacing a second cardiac region includes pacing a second atrial chamber. - View Dependent Claims (15, 16)
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17. A method, comprising:
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pacing a first cardiac region to maintain at least a minimum cardiac rate; and pacing a second cardiac region to maintain at least the minimum cardiac rate when a pace in the first cardiac region is inhibited, wherein both of the first and second cardiac regions are located in a single cardiac chamber. - View Dependent Claims (18, 19)
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20. An apparatus, comprising:
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means for pacing a first cardiac region to maintain at least a minimum cardiac rate; means for detecting a cardiac event at the first cardiac region; means for inhibiting pacing to the first cardiac region during a pace protection interval after the cardiac event; and means for pacing a second cardiac region to maintain the cardiac rate at least the minimum rate when the means for pacing the first cardiac region is inhibited. - View Dependent Claims (21, 22, 23)
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24. An apparatus, comprising:
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an input to receive a sensor signal; a cardiac signal analyzer to communicate with the input to determine a cardiac rate; an output to communicate with the analyzer to pace at least one of a first cardiac region or a second cardiac region to maintain the cardiac rate at a minimum value; and a pace protection circuit connected to the output to inhibit pacing to the first cardiac region during a pace protection interval and to pace the second cardiac region to maintain the cardiac rate during the pace protection interval. - View Dependent Claims (25, 26, 27)
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28. An apparatus, comprising:
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a signal generator; a first electrode adapted for connection to the signal generator; a second electrode adapted for connection to the signal generator; and where the signal generator includes; a cardiac signal analyzer adapted to determine a cardiac rate from a signal sensed using the first electrode or adapted to determine a cardiac rate from a signal sensed using the second electrode; a pacing output adapted to provide pacing pulses to the first electrode to maintain a cardiac rate at least a minimum rate value; and a pace protection circuit adapted to start a pace protection interval after a cardiac event and to inhibit pacing pulses from the pacing output to a first cardiac chamber during the pace protection interval, and provide a pacing pulse from the pacing output to the second electrode at a safety interval timed from the inhibited pacing pulse to the first cardiac chamber. - View Dependent Claims (29, 30, 31)
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Specification