Atrial tracking confirmation in an intracardiac ventricular pacemaker
First Claim
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1. An intracardiac pacemaker, comprising:
- a pulse generator configured to deliver pacing pulses to a ventricle of a patient'"'"'s heart via electrodes coupled to the pacemaker;
a motion sensor configured to generate a signal that indicates an atrial event attendant to atrial motion and at least one ventricular event attendant to ventricular motion during each cardiac cycle; and
a control circuit coupled to the motion sensor and the pulse generator and configured to;
detect a first event from the motion sensor signal;
set an atrioventricular (AV) interval in response to detecting the first event;
controlling the pulse generator to deliver a first ventricular pacing pulse in response to the AV interval expiring;
withhold delivering a second ventricular pacing pulse for one cardiac cycle;
detect a second event from the motion sensor signal following the first event;
confirm that the first event is the atrial event in response to the second event occurring at least a threshold time interval since the first ventricular pacing pulse; and
deliver a therapy based on confirming that the first event is the atrial event.
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Abstract
A pacemaker having a motion sensor delivers atrial-synchronized ventricular pacing by detecting events from a signal produced by the motion sensor and delivering ventricular pacing pulses at a rate that tracks the rate of the detected events. The pacemaker is configured to confirm atrial tracking of the ventricular pacing pulses by determining if detected events from the motion sensor signal are atrial events. The pacemaker is configured to adjust a control parameter used for detecting events from the motion sensor signal if atrial tracking is not confirmed.
15 Citations
43 Claims
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1. An intracardiac pacemaker, comprising:
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a pulse generator configured to deliver pacing pulses to a ventricle of a patient'"'"'s heart via electrodes coupled to the pacemaker; a motion sensor configured to generate a signal that indicates an atrial event attendant to atrial motion and at least one ventricular event attendant to ventricular motion during each cardiac cycle; and a control circuit coupled to the motion sensor and the pulse generator and configured to; detect a first event from the motion sensor signal; set an atrioventricular (AV) interval in response to detecting the first event; controlling the pulse generator to deliver a first ventricular pacing pulse in response to the AV interval expiring; withhold delivering a second ventricular pacing pulse for one cardiac cycle; detect a second event from the motion sensor signal following the first event; confirm that the first event is the atrial event in response to the second event occurring at least a threshold time interval since the first ventricular pacing pulse; and deliver a therapy based on confirming that the first event is the atrial event. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
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21. A method performed by an intracardiac ventricular pacemaker, the method comprising:
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detecting by a control circuit of the pacemaker a first event from a motion sensor signal produced by a motion sensor, the motion sensor signal comprising an atrial event attendant to each atrial contraction and at least one ventricular event attendant to ventricular motion during each ventricular cardiac cycle; setting an atrioventricular (AV) interval in response to detecting the first event; controlling a pulse generator to deliver a first ventricular pacing pulse in response to the AV interval expiring; withholding delivering a second ventricular pacing pulse for one cardiac cycle; detecting a second event from the motion sensor signal following the first event; confirming that the first event is the atrial event in response to the second event occurring at least a threshold time interval since the first ventricular pacing pulse, and confirming atrial tracking of pacing pulses delivered by the pacemaker in response to confirming that the first event is the atrial event. - View Dependent Claims (22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40)
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41. A non-transitory computer-readable medium storing a set of instructions which when executed by a control circuit of an intracardiac ventricular pacemaker having a motion sensor, cause the pacemaker to confirm atrial tracking of pacing pulses delivered by the pacemaker by:
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detecting a first event from the motion sensor signal; setting an atrioventricular (AV) interval in response to detecting the first event; delivering a first ventricular pacing pulse in response to the AV interval expiring; withholding delivering a second ventricular pacing for one cardiac cycle; detecting a third event from the motion sensor signal following the first event; confirming that the first event is the atrial event in response to the second event occurring at least a threshold time interval since the first ventricular pacing pulse; and confirming atrial tracking of pacing pulses delivered by the pacemaker in response to confirming that the first event is the atrial event.
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42. A pacemaker comprising:
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a pulse generator configured to deliver pacing pulses to a ventricle of a patient'"'"'s heart via electrodes coupled to the pacemaker; a motion sensor configured to produce a signal comprising an atrial event attendant to atrial motion and at least one ventricular event attendant to ventricular motion during each cardiac cycle; and a control circuit coupled to the motion sensor and the pulse generator and configured to; detect a plurality of events from the motion sensor signal; during an atrial-synchronized ventricular pacing mode, control the pulse generator to deliver the pacing pulses at a rate that is tracked to the detected plurality of events; confirm whether the detected plurality of events from the motion sensor signal are atrial events; return to the atrial-synchronized ventricular pacing mode in response to confirming that the detected plurality of events are the atrial events; and adjust a control parameter used to detect events from the motion sensor signal in response to not confirming that the detected plurality of events are the atrial events. - View Dependent Claims (43)
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Specification