Implantable medical device and method for determining his bundle pacing capture
AssigneeMedtronic, Inc.
InventorsTodd J. Sheldon, Elizabeth A. Mattson, Eric R. Williams, Zhongping Yang, Shawn M. Campbell
Life of this patent
Estimating the term…
Abstract
An implantable medical device system receives a cardiac electrical signal produced by a patient's heart and comprising atrial P-waves and delivers a His bundle pacing pulse to the patient's heart via a His pacing electrode vector. The system determines a timing of a sensed atrial P-wave relative to the His bundle pacing pulse and determines a type of capture of the His bundle pacing pulse in response to the determined timing of the atrial P-wave.
Claims21
A medical device, comprising:
- a sensing circuit configured to:
- sense a near field cardiac signal via a first sensing electrode vector;
- sense a far field cardiac signal via a second sensing electrode vector;
- a therapy delivery circuit configured to deliver a first pacing pulse having a first pacing pulse energy;
- a memory configured to store a threshold for comparing to a first feature of the far field cardiac signal for distinguishing between capture of only ventricular myocardium and capture that includes at least a portion of a ventricular conduction system;
- and
- a control circuit configured to:
- detect a QRS signal from the near field cardiac signal sensed by the sensing circuit following the first pacing pulse;
- determine the first feature of the far field cardiac signal in response to detecting the QRS signal from the near field cardiac signal;
- compare the first feature to the threshold;
- and
- detect capture, by the first pacing pulse, that includes at least the portion of the ventricular conduction system based on at least the first feature of the far field cardiac signal meeting the threshold.
A method comprising:
- sensing a near field cardiac signal via a first sensing electrode vector;
- sensing a far field cardiac signal via a second sensing electrode vector;
- delivering a first pacing pulse having a first pacing pulse energy;
- storing a threshold for comparing to a first feature of the far field cardiac signal feature for distinguishing between capture of only ventricular myocardium and capture that includes at least a portion of a ventricular conduction system;
- detecting a QRS signal from the near field cardiac signal sensed following the first pacing pulse;
- determining the first feature of the far field cardiac signal in response to detecting the QRS signal from the near field cardiac signal;
- comparing the first feature to the threshold;
- and
- detecting capture, by the first pacing pulse, that includes at least the portion of the ventricular conduction system based on at least the first feature of the far field cardiac signal meeting the threshold.
A non-transitory computer readable medium storing a set of instructions that, when executed by a control circuit of a medical device, cause the medical device to:
- sense a near field cardiac signal via a first sensing electrode vector;
- sense a far field cardiac signal via a second sensing electrode vector;
- deliver a pacing pulse;
- detect a QRS signal from the near field cardiac signal sensed following the pacing pulse;
- determining a feature of the far field cardiac signal in response to detecting the QRS signal from the near field cardiac signal;
- comparing the feature to a threshold for distinguishing between capture of only ventricular myocardium and capture that includes at least a portion of a ventricular conduction system;
- and
- detecting capture, by the pacing pulse, that includes at least the portion of the ventricular conduction system based on at least the feature of the far field cardiac signal meeting the threshold.
Dependencies are inferred from the claim text.