Mode switching by a ventricular leadless pacing device
First Claim
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1. A method comprising:
- sensing an electrical cardiac signal of a patient with a leadless pacing device while the leadless pacing device is in a sensing without pacing mode;
receiving, by a processing module, the electrical cardiac signal;
detecting, by the processing module and based on the electrical cardiac signal, an atrial activation event;
determining, by the processing module and based on the electrical cardiac signal, a ventricular sense event was not detected within a ventricular event detection window that begins at the atrial activation event; and
controlling, by the processing module, the leadless pacing device to switch from the sensing without pacing mode to an atrio-ventricular synchronous pacing mode based on the determination that the ventricular sense event was not detected within the ventricular event detection window, wherein controlling the leadless pacing device to switch to the atrio-ventricular synchronous pacing mode comprises controlling the leadless pacing device to deliver a pacing pulse to the patient according to the atrio-ventricular synchronous pacing mode after detecting an additional atrial activation event.
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Abstract
In some examples, a leadless pacing device (hereinafter, “LPD”) is configured for implantation in a ventricle of a heart of a patient, and is configured to switch between an atrio-ventricular synchronous pacing mode and an asynchronous ventricular pacing mode in response to detection of one or more sensing events, which may be, for example, undersensing events. In some examples, an LPD is configured to switch from a sensing without pacing mode to an atrio-ventricular synchronous pacing mode in response to determining, for a threshold number of cardiac cycles, a ventricular depolarization was not detected within a ventricular event detection window that begins at an atrial activation event.
508 Citations
29 Claims
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1. A method comprising:
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sensing an electrical cardiac signal of a patient with a leadless pacing device while the leadless pacing device is in a sensing without pacing mode; receiving, by a processing module, the electrical cardiac signal; detecting, by the processing module and based on the electrical cardiac signal, an atrial activation event; determining, by the processing module and based on the electrical cardiac signal, a ventricular sense event was not detected within a ventricular event detection window that begins at the atrial activation event; and controlling, by the processing module, the leadless pacing device to switch from the sensing without pacing mode to an atrio-ventricular synchronous pacing mode based on the determination that the ventricular sense event was not detected within the ventricular event detection window, wherein controlling the leadless pacing device to switch to the atrio-ventricular synchronous pacing mode comprises controlling the leadless pacing device to deliver a pacing pulse to the patient according to the atrio-ventricular synchronous pacing mode after detecting an additional atrial activation event. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. A leadless pacing system comprising:
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a leadless pacing device configured to sense an electric cardiac signal and configured to operate in a sensing without pacing mode and an atrio-ventricular synchronous pacing mode; and a processing module configured to; receive the electrical cardiac signal sensed by a leadless pacing device while the leadless pacing device is in the sensing without pacing mode, detect, based on the electrical cardiac signal, an atrial activation event, determine, based on the electrical cardiac signal, a ventricular sense event was not detected within a ventricular event detection window that begins at the atrial activation event, and control the leadless pacing device to switch from the sensing without pacing mode to the atrio-ventricular synchronous pacing mode based on the determination that the ventricular sense event was not detected within the ventricular event detection window, wherein the processing module is configured to control the leadless pacing device to switch to the atrio-ventricular synchronous pacing mode by at least controlling the leadless pacing device to deliver a pacing pulse to the patient according to the atrio-ventricular synchronous pacing mode after detecting an additional atrial activation event. - View Dependent Claims (16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29)
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Specification