Safety pacing in multi-site CRM devices
First Claim
1. An apparatus, comprising:
- means for sensing a first cardiac signal from a first cardiac region and a second cardiac signal from a second cardiac region;
means for pacing the 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 the second cardiac region to maintain the cardiac rate at at least the minimum rate when the means for pacing the first cardiac region is inhibited.
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Abstract
An apparatus and method for providing pacing pulses to a second site when the pacing pulses are inhibited from being provided to a first site. A first cardiac signal and a second cardiac signal are sensed, where both the first and second cardiac signals include indications of cardiac events. A cardiac rate is determined from the cardiac events in one of the first cardiac signal or the second cardiac signal, and pacing pulses are provided to the first cardiac region in order to maintain the cardiac rate at at least a minimum rate value. A pace protection interval starts when a cardiac event is detected in the first cardiac signal. The pace protection interval inhibits delivery of pacing pulses to the first cardiac region. When pacing pulses to the first cardiac region are inhibited because of the pace protection interval, pacing pulses are provided to the second cardiac region at a safety interval timed from the inhibited pacing pulse to the first cardiac region.
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Citations
20 Claims
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1. An apparatus, comprising:
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means for sensing a first cardiac signal from a first cardiac region and a second cardiac signal from a second cardiac region;
means for pacing the 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 the second cardiac region to maintain the cardiac rate at at least the minimum rate when the means for pacing the first cardiac region is inhibited. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. An apparatus, comprising:
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an input to receive sensor signals representative of a first cardiac signal from a first cardiac region and a second cardiac signal from a second cardiac region;
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 the first cardiac region and the 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 (12, 13, 14, 15, 16, 17)
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18. A method of safety pacing in multi-site cardiac rhythm management (CRM) devices, 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;
determining a cardiac rate from at least one of the first cardiac signal and the second cardiac signal;
pacing the first cardiac region to maintain the cardiac rate at at least a minimum rate value;
detecting a first cardiac event in the first cardiac signal;
initiating a pace protection interval from the first cardiac signal after the first cardiac event;
inhibiting pacing to the first cardiac region during the pace protection interval; and
pacing the second cardiac region to maintain the cardiac rate at at least the minimum rate value in response to inhibiting pacing to the first cardiac region during the pace protection interval. - View Dependent Claims (19, 20)
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Specification