System and method for optimizing far-field r-wave sensing by switching electrode polarity during atrial capture verification
AssigneePacesetter, Inc.
InventorsLaurence S. Sloman, Paul A. Levine
Life of this patent
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Abstract
An implantable stimulator device provides automatic electrode polarity switching during an atrial capture verification mode. In systems using a bipolar sensing configuration in the atrium, polarity switching will be advantageous in detecting far-field R-waves for verification of capture. This automatic polarity switching feature is programmable and enables or disables automatic switching from bipolar to unipolar sensing at the onset of a far-field interval window and switching again back to bipolar pacing at the end of the far-field interval window.
Claims25
A method of detecting capture in an atrial chamber, the method comprising:
- delivering an atrial stimulation pulse to the atrial chamber using a stimulation electrode polarity configuration;
- setting a detection window at a time based on the delivered atrial stimulation pulse;
- monitoring an atrial channel for a far-field R-wave in the detection window using a capture sensing electrode polarity configuration that is different from the stimulation electrode Polarity configuration;
- and
- verifying capture of the atrial chamber if a far-field R-wave is detected in the detection window.
A device for detecting capture in an atrial chamber, the device comprising:
- a pulse generator that is operative to generate a stimulation pulse for delivery to the atrial chamber;
- timing circuitry that is operative to generate a detection window at a time based on the stimulation pulse;
- switching circuitry to switch polarity of an atrial electrode from a stimulation electrode polarity configuration used to deliver the stimulation pulse to the atrial chamber to a capture sensing electrode polarity;
- detection circuitry that is operative to monitor an atrial channel for a far-field R-wave during the detection window;
- and
- control circuitry connected to the pulse generator, timing circuitry, and detection circuitry, the control circuitry being responsive to detection of a far-field R-wave by the detection circuitry to verify capture of the atrial chamber.
A method of detecting capture in an atrial chamber, the method comprising:
- delivering an atrial stimulation pulse to the atrial chamber;
- setting a detection window at a time based on the delivered atrial stimulation pulse;
- monitoring an atrial channel for a far-field R-wave in the detection window;
- and
- performing an atrial stimulation threshold determination if no far-field R-wave is detected in the detection window.
A device for detecting capture in an atrial chamber, the device comprising:
- a pulse generator that is operative to generate a stimulation pulse for delivery to the atrial chamber;
- timing circuitry that is operative to generate a detection window at a time based on the stimulation pulse;
- detection circuitry that is operative to monitor an atrial channel for a far-field R-wave during the detection window;
- and
- control circuitry connected to the pulse generator, timing circuitry, and detection circuitry, the control circuitry being responsive to the detection circuitry falling to detect a far-fleld R-wave to perform an atrial stimulation threshold determination.
Dependencies are inferred from the claim text.