Atrial tracking in an intracardiac 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 comprising a ventricular diastolic event and an atrial systolic event; and
a control circuit coupled to the motion sensor and the pulse generator and configured to;
detect the ventricular diastolic event from the motion signal;
start an atrial refractory period having an expiration time set based on a time of the detection of the ventricular diastolic event;
detect a first atrial systolic event from the motion signal after expiration of the atrial refractory period; and
control the pulse generator to deliver a first pacing pulse to the ventricle at a first atrioventricular pacing time interval after the first atrial systolic event detection.
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Abstract
An intracardiac ventricular pacemaker is configured to detect a ventricular diastolic event from a motion signal received by a pacemaker control circuit from a motion sensor. The control circuit starts an atrial refractory period having an expiration time set based on a time of the detection of the ventricular diastolic event. The control circuit detects an atrial systolic event from the motion signal after expiration of the atrial refractory period and controls a pulse generator of the pacemaker to deliver a pacing pulse to a ventricle of a patient'"'"'s heart at a first atrioventricular pacing time interval after the atrial systolic event detection.
54 Citations
22 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 a ventricular diastolic event and an atrial systolic event; and a control circuit coupled to the motion sensor and the pulse generator and configured to; detect the ventricular diastolic event from the motion signal; start an atrial refractory period having an expiration time set based on a time of the detection of the ventricular diastolic event; detect a first atrial systolic event from the motion signal after expiration of the atrial refractory period; and control the pulse generator to deliver a first pacing pulse to the ventricle at a first atrioventricular pacing time interval after the first atrial systolic event detection. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 22)
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11. A method performed by an intracardiac pacemaker, comprising:
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detecting by a control circuit of the pacemaker a ventricular diastolic event from a motion signal received by the control circuit from a motion sensor; starting an atrial refractory period having an expiration time set based on a time of the detection of the ventricular diastolic event; detecting a first atrial systolic event from the motion signal after expiration of the atrial refractory period; and controlling a pulse generator of the pacemaker to deliver a first pacing pulse to a ventricle of a patient'"'"'s heart at a first atrioventricular pacing time interval after the first atrial systolic event detection. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20)
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21. 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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detect a ventricular diastolic event from a motion signal produced by the motion sensor; start an atrial refractory period having an expiration time set based on a time of the detection of the ventricular diastolic event; detect an atrial systolic event from the motion signal after expiration of the atrial refractory period; and control a pulse generator of the pacemaker to deliver a pacing pulse to a ventricle of a patient'"'"'s heart at an atrioventricular pacing time interval after the atrial systolic event detection.
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Specification