Pacing mode switching in a ventricular pacemaker
First Claim
1. An intracardiac ventricular pacemaker, comprising:
- a pulse generator configured to generate and deliver pacing pulses to a ventricle of a patient'"'"'s heart via electrodes coupled to the pacemaker;
a motion sensor configured to produce a motion signal; and
a control circuit configured to receive the motion signal and communicate with the pulse generator, the control circuit configured to;
detect atrial systolic events from the motion signal;
operate in a selected one of an atrial-tracking ventricular pacing mode and a non-atrial tracking ventricular pacing mode;
while operating in the selected one of the atrial-tracking ventricular pacing mode and the non-atrial tracking ventricular pacing mode, determine at least one motion signal metric based on a rate of at least some of the detected atrial systolic events;
determine a patient physical activity metric from the motion signal;
set a pacing mode switching threshold based on the patient physical activity metric;
compare the at least one motion signal metric to the pacing mode switching threshold; and
responsive to the pacing mode switching threshold being satisfied, switch from the selected one of the non-atrial tracking pacing mode and the atrial tracking pacing mode to the other one of the non-atrial tracking pacing mode and the atrial tracking pacing mode for controlling the pacing pulses delivered by the pulse generator.
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Accused Products
Abstract
An intracardiac ventricular pacemaker is configured to operate in in a selected one of an atrial-tracking ventricular pacing mode and a non-atrial tracking ventricular pacing mode. A control circuit of the pacemaker determines at least one motion signal metric from the motion signal, compares the at least one motion signal metric to pacing mode switching criteria; and responsive to the pacing mode switching criteria being satisfied, switches from the selected one of the non-atrial tracking pacing mode and the atrial tracking pacing mode to the other one of the non-atrial tracking pacing mode and the atrial tracking pacing mode for controlling ventricular pacing pulses delivered by the pacemaker.
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Citations
29 Claims
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1. An intracardiac ventricular pacemaker, comprising:
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a pulse generator configured to generate and deliver pacing pulses to a ventricle of a patient'"'"'s heart via electrodes coupled to the pacemaker; a motion sensor configured to produce a motion signal; and a control circuit configured to receive the motion signal and communicate with the pulse generator, the control circuit configured to; detect atrial systolic events from the motion signal; operate in a selected one of an atrial-tracking ventricular pacing mode and a non-atrial tracking ventricular pacing mode; while operating in the selected one of the atrial-tracking ventricular pacing mode and the non-atrial tracking ventricular pacing mode, determine at least one motion signal metric based on a rate of at least some of the detected atrial systolic events; determine a patient physical activity metric from the motion signal; set a pacing mode switching threshold based on the patient physical activity metric; compare the at least one motion signal metric to the pacing mode switching threshold; and responsive to the pacing mode switching threshold being satisfied, switch from the selected one of the non-atrial tracking pacing mode and the atrial tracking pacing mode to the other one of the non-atrial tracking pacing mode and the atrial tracking pacing mode for controlling the pacing pulses delivered by the pulse generator. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. An intracardiac ventricular pacemaker comprising:
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a pulse generator configured to generate and deliver pacing pulses to a ventricle of a patient'"'"'s heart via electrodes coupled to the pacemaker; a motion sensor configured to produce a motion signal; and a control circuit configured to receive the motion signal and communicate with the pulse generator, the control circuit configured to; detect an atrial systolic event from the motion signal; detect a ventricular diastolic event from the motion signal; operate in a selected one of an atrial-tracking ventricular pacing mode and a non-atrial tracking ventricular pacing mode; while operating in the selected one of the atrial-tracking ventricular pacing mode and the non-atrial tracking ventricular pacing mode, determine at least one motion signal metric based on a time interval from the ventricular diastolic event to the atrial systolic event; compare the at least one motion signal metric to pacing mode switching criteria; and responsive to the pacing mode switching criteria being satisfied, switch from the selected one of the non-atrial tracking pacing mode and the atrial tracking pacing mode to the other one of the non-atrial tracking pacing mode and the atrial tracking pacing mode for controlling the pacing pulses delivered by the pulse generator.
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16. A method performed by an intracardiac ventricular pacemaker having a motion sensor configured to produce a motion signal, the method comprising:
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detecting atrial systolic events from the motion signal; operating in a selected one of an atrial-tracking ventricular pacing mode and a non-atrial tracking ventricular pacing mode; while operating in the selected one of the atrial-tracking ventricular pacing mode and the non-atrial tracking ventricular pacing mode, determining by a control circuit of the pacemaker at least one motion signal metric based on a rate of at least some of the detected atrial systolic events; determining a patient physical activity metric from the motion signal; setting a pacing mode switching threshold based on the patient physical activity metric; comparing the at least one motion signal metric to pacing mode switching criteria, wherein the comparing comprises comparing the rate of the at least some of the detected atrial systolic events to the pacing mode switching threshold; and responsive to the pacing mode switching criteria being satisfied, switching from the selected one of the non-atrial tracking pacing mode and the atrial tracking pacing mode to the other one of the non-atrial tracking pacing mode and the atrial tracking pacing mode for controlling ventricular pacing pulses delivered by the pacemaker. - View Dependent Claims (17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28)
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29. A method performed by an intracardiac ventricular pacemaker having a motion sensor configured to produce a motion signal, the method comprising:
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detecting a ventricular diastolic event from the motion signal; detecting an atrial systolic event from the motion signal; operating in a selected one of an atrial-tracking ventricular pacing mode and a non-atrial tracking ventricular pacing mode; while operating in the selected one of the atrial-tracking ventricular pacing mode and the non-atrial tracking ventricular pacing mode, determining the at least one motion signal metric based on a time interval from the ventricular diastolic event to the atrial systolic event; comparing the at least one motion signal metric to pacing mode switching criteria; and responsive to the pacing mode switching criteria being satisfied, switching from the selected one of the non-atrial tracking pacing mode and the atrial tracking pacing mode to the other one of the non-atrial tracking pacing mode and the atrial tracking pacing mode for controlling ventricular pacing pulses delivered by the pacemaker.
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Specification