Pacemaker passive measurement testing system and method
First Claim
1. A method for operating a medical device including a pacemaker, the method comprising:
- operating the pacemaker in a first programmed mode including;
detecting first cardiac events from a first sensing channel; and
inhibiting or triggering a first pacing pulse at a first pacing channel when each of the first cardiac events is detected;
applying a refractory period to a second sensing channel to time a transition after which the pacemaker is ready for operation in a second programmed mode;
switching to operating the pacemaker in the second programmed mode upon detecting a second cardiac event from the second sensing channel after the refractory period expires, the second programmed mode allowing a sensing test including detection of at least the second cardiac event through the second sensing channel, wherein the detection of the at least the second cardiac event does not inhibit or trigger any pacing pulse; and
operating the pacemaker in the first programmed mode upon completion of the sensing test.
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Abstract
A system and method for passively testing a cardiac pacemaker in which sensing signal amplitudes and lead impedance values are measured and stored while the pacemaker is functioning in its programmed mode. The amplitude and impedance data may be gotten and stored periodically at regular intervals to generate a historical record for diagnostic purposes. Sensing signal amplitudes may also be measured and stored from a sensing channel which is currently not programmed to be active as long as the pacemaker is physically configured to support the sensing channel. Such data can be useful in evaluating whether a switch in the pacemaker'"'"'s operating mode is desirable.
37 Citations
24 Claims
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1. A method for operating a medical device including a pacemaker, the method comprising:
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operating the pacemaker in a first programmed mode including;
detecting first cardiac events from a first sensing channel; and
inhibiting or triggering a first pacing pulse at a first pacing channel when each of the first cardiac events is detected;
applying a refractory period to a second sensing channel to time a transition after which the pacemaker is ready for operation in a second programmed mode;
switching to operating the pacemaker in the second programmed mode upon detecting a second cardiac event from the second sensing channel after the refractory period expires, the second programmed mode allowing a sensing test including detection of at least the second cardiac event through the second sensing channel, wherein the detection of the at least the second cardiac event does not inhibit or trigger any pacing pulse; and
operating the pacemaker in the first programmed mode upon completion of the sensing test. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A system including a pacemaker coupled to a first lead disposed in a first cardiac region and a second lead disposed in a second cardiac region, the system comprising:
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a first sensing channel coupled to the first lead;
a second sensing channel coupled to the second lead;
a first pacing channel coupled to the first lead;
a refractory period timer coupled to the second sensing channel, the refractory period timer adapted to generate a refractory period to time transitions from a first programmed mode to a second programmed mode; and
a controller coupled to the first and second sensing channels and the refractory period timer, the controller adapted to perform tasks comprising;
operating the pacemaker in a first programmed mode including;
detecting first cardiac events from the first sensing channel; and
inhibiting or triggering a first pacing pulse at the first pacing channel when each of the first cardiac events is detected;
switching to operating the pacemaker in the second programmed mode upon detecting a second cardiac event from the second sensing channel after the refractory period expires, the second programmed mode allowing a sensing test including detection of at least the second cardiac event through the second sensing channel, wherein the detection of the at least the second cardiac event does not inhibit or trigger any pacing pulse; and
operating the pacemaker in the first programmed mode upon completion of the sensing test. - View Dependent Claims (14, 15, 16, 17, 18, 19, 20)
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21. A method for operating a medical device including a pacemaker, the method comprising:
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operating a pacemaker in a first programmed mode;
applying a refractory period to a sensing channel unprogrammed during the operation in the first programmed mode, to time a transition after which the pacemaker is ready for operation in a second programmed mode; and
switching to the second programmed mode upon detecting a cardiac event from the sensing channel after the refractory period expires. - View Dependent Claims (22)
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23. A system including a pacemaker capable of operating in at least a first and a second programmed modes, the system comprising:
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a sensing channel unprogrammed when the pacemaker operates in the first programmed mode;
a refractory period timer coupled to the sensing channel, the refractory period timer adapted to generate a refractory period to time a transition from the first programmed mode to the second programmed mode; and
a controller, coupled to the sensing channel and the refractory period timer, the controller adapted to;
operate the pacemaker in the first programed mode; and
switch to operating the pacemaker in the second programmed mode upon detecting a cardiac event from the sensing channel after the refractory period expires. - View Dependent Claims (24)
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Specification