ATRIAL TRACKING IN AN INTRACARDIAC 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 comprising an atrial systolic event and a ventricular diastolic event indicating a passive ventricular filling phase; and
a control circuit coupled to the motion sensor and the pulse generator and configured to;
set a detection threshold to a first amplitude during an expected time interval of the ventricular diastolic event and to a second amplitude lower than the first amplitude after the expected time interval of the ventricular diastolic event;
detect the atrial systolic event in response to the motion signal crossing the detection threshold;
set an atrioventricular pacing interval in response to detecting the atrial systolic event; and
control the pulse generator to deliver a pacing pulse to the ventricle in response to the atrioventricular pacing interval expiring.
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Accused Products
Abstract
An intracardiac ventricular pacemaker having a motion sensor is configured to produce a motion signal including an atrial systolic event and a ventricular diastolic event indicating a passive ventricular filling phase, set a detection threshold to a first amplitude during an expected time interval of the ventricular diastolic event and to a second amplitude lower than the first amplitude after an expected time interval of the ventricular diastolic event. The pacemaker is configured to detect the atrial systolic event in response to the motion signal crossing the detection threshold and set an atrioventricular pacing interval in response to detecting the atrial systolic event.
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Citations
23 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 comprising an atrial systolic event and a ventricular diastolic event indicating a passive ventricular filling phase; and a control circuit coupled to the motion sensor and the pulse generator and configured to; set a detection threshold to a first amplitude during an expected time interval of the ventricular diastolic event and to a second amplitude lower than the first amplitude after the expected time interval of the ventricular diastolic event; detect the atrial systolic event in response to the motion signal crossing the detection threshold; set an atrioventricular pacing interval in response to detecting the atrial systolic event; and control the pulse generator to deliver a pacing pulse to the ventricle in response to the atrioventricular pacing interval expiring. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A method performed by an intracardiac pacemaker having a motion sensor, comprising:
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producing by the motion sensor a motion signal comprising an atrial systolic event and a ventricular diastolic event indicating a passive ventricular filling phase; setting by a control circuit of the pacemaker a detection threshold to a first amplitude during an expected time interval of the ventricular diastolic event and to a second amplitude lower than the first amplitude after an expected time interval of the ventricular diastolic event; detecting the atrial systolic event in response to the motion signal crossing the detection threshold; setting an atrioventricular pacing interval in response to detecting the atrial systolic event; and delivering a pacing pulse to a ventricle of a patient'"'"'s heart via electrodes coupled to the pacemaker in response to the atrioventricular pacing interval expiring. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19, 20, 21, 22)
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23. 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:
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produce by the motion sensor a motion signal comprising an atrial systolic event and a ventricular diastolic event indicating a passive ventricular filling phase and; set a detection threshold to a first amplitude during an expected time interval of the ventricular diastolic event and to a second amplitude lower than the first amplitude after an expected time interval of the ventricular diastolic event; detect the atrial systolic event in response to the motion signal crossing the detection threshold; set an atrioventricular pacing interval in response to detecting the atrial systolic event; and deliver a pacing pulse upon expiration of the atrioventricular pacing interval to a ventricle of a patient'"'"'s heart via electrodes coupled to the pacemaker.
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Specification