PACING MODE SWITCHING AND RATE RESPONSE LIMIT IN A VENTRICULAR PACEMAKER
First Claim
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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;
a control circuit coupled to the motion sensor and the pulse generator; and
a housing wholly implantable within a ventricular chamber of the patient'"'"'s heart and enclosing the pulse generator, the motion sensor and the control circuit;
the control circuit being configured to;
identify a ventricular systolic event;
detect a ventricular passive filling event signal from the motion signal;
determine a time interval from the ventricular systolic event to the ventricular passive filling event;
establish a minimum pacing interval based on the time interval;
determine a sensor indicated pacing rate interval;
compare the sensor indicated pacing rate interval to the minimum pacing interval; and
control the pulse generator to deliver a ventricular pacing pulse at the minimum pacing interval in response to the sensor indicated pacing rate interval being less than the minimum pacing interval.
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Abstract
An intracardiac ventricular pacemaker having a motion sensor, a pulse generator and a control circuit coupled to the pulse generator and the motion sensor is configured to identify a ventricular systolic event, detect a ventricular passive filling event signal from the motion signal, and determine a time interval from the ventricular systolic event to the ventricular passive filling event. The pacemaker establishes a minimum pacing interval based on the time interval.
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Citations
25 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; a control circuit coupled to the motion sensor and the pulse generator; and a housing wholly implantable within a ventricular chamber of the patient'"'"'s heart and enclosing the pulse generator, the motion sensor and the control circuit; the control circuit being configured to; identify a ventricular systolic event; detect a ventricular passive filling event signal from the motion signal; determine a time interval from the ventricular systolic event to the ventricular passive filling event; establish a minimum pacing interval based on the time interval; determine a sensor indicated pacing rate interval; compare the sensor indicated pacing rate interval to the minimum pacing interval; and control the pulse generator to deliver a ventricular pacing pulse at the minimum pacing interval in response to the sensor indicated pacing rate interval being less than the minimum pacing interval. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. 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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identifying a ventricular systolic event by a control circuit of the pacemaker; detecting by the control circuit a ventricular passive filling event signal from the motion signal produced by the motion sensor within a ventricular chamber of the patient'"'"'s heart; determining a time interval from the ventricular systolic event to the ventricular passive filling event; establishing a minimum pacing interval based on the time interval; determining a sensor indicated pacing rate interval; comparing the sensor indicated pacing rate interval to the minimum pacing interval; and controlling a pulse generator to deliver a ventricular pacing pulse at the minimum pacing interval in response to the sensor indicated pacing rate interval being less than the minimum pacing interval. - View Dependent Claims (14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24)
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25. 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 configured to produce a motion signal, cause the pacemaker to:
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identify a ventricular systolic event; detect a ventricular passive filling event signal from the motion signal produced by the motion sensor within a ventricular chamber of a patient'"'"'s heart; determine a time interval from the ventricular systolic event to the ventricular passive filling event; establish a minimum pacing interval based on the time interval; determine a sensor indicated pacing rate interval; compare the sensor indicated pacing rate interval to the minimum pacing interval; and deliver a ventricular pacing pulse at the minimum pacing interval in response to the sensor indicated pacing rate interval being less than the minimum pacing interval.
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Specification