System and method for optimizing far-field r-wave sensing by switching electrode polarity during atrial capture verification
First Claim
Patent Images
1. 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.
1 Assignment
0 Petitions
Accused Products
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.
178 Citations
25 Claims
-
1. 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. - View Dependent Claims (2, 3, 4, 5)
-
-
6. 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. - View Dependent Claims (7, 8, 9, 10)
-
-
11. 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. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19)
-
-
20. 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. - View Dependent Claims (21, 22, 23, 24, 25)
-
Specification