FAR-FIELD R-WAVE DETECTION TO CONTROL ATRIAL PACE TIMING IN A DUAL-CHAMBER LEADLESS PACEMAKER
First Claim
1. A method for sensing far-field R-waves in a leadless, intracardiac pacemaker implanted in an atrium of a patient'"'"'s heart, the method comprising:
- sensing an electrical signal generated by the heart with two electrodes and at least one of a first sensing channel of the pacemaker or a second sensing channel of the pacemaker, wherein the first sensing channel is configured to sense P-waves and reject far-field R-waves, and wherein the second sensing channel is configured to sense both P-waves and far-field R-waves;
comparing, with a processor in the pacemaker, a first timing marker from the first sensing channel with a second timing marker from the second sensing channel; and
either;
determining, with the processor, that the sensed signal is a P-wave, if the first and second timing markers indicate that the sensed signal was sensed by the first and second sensing channels within a predetermined threshold of time from one another;
ordetermining, with the processor, that the sensed signal is a far-field R-wave, if the sensed signal is sensed by the second sensing channel and not sensed by the first sensing channel.
1 Assignment
0 Petitions
Accused Products
Abstract
A method for sensing far-field R-waves in a leadless, intracardiac pacemaker implanted in an atrium of a patient'"'"'s heart may involve sensing an electrical signal generated by the heart with two electrodes and a first sensing channel and/or a second sensing channel of the pacemaker, comparing a first timing marker from the first sensing channel with a second timing marker from the second sensing channel, and either determining that the sensed signal is a P-wave, if the first and second timing markers indicate that the sensed signal was sensed by the first and second sensing channels within a predetermined threshold of time from one another, or determining that the sensed signal is a far-field R-wave, if the sensed signal is sensed by the second sensing channel and not sensed by the first sensing channel.
36 Citations
29 Claims
-
1. A method for sensing far-field R-waves in a leadless, intracardiac pacemaker implanted in an atrium of a patient'"'"'s heart, the method comprising:
-
sensing an electrical signal generated by the heart with two electrodes and at least one of a first sensing channel of the pacemaker or a second sensing channel of the pacemaker, wherein the first sensing channel is configured to sense P-waves and reject far-field R-waves, and wherein the second sensing channel is configured to sense both P-waves and far-field R-waves; comparing, with a processor in the pacemaker, a first timing marker from the first sensing channel with a second timing marker from the second sensing channel; and either; determining, with the processor, that the sensed signal is a P-wave, if the first and second timing markers indicate that the sensed signal was sensed by the first and second sensing channels within a predetermined threshold of time from one another;
ordetermining, with the processor, that the sensed signal is a far-field R-wave, if the sensed signal is sensed by the second sensing channel and not sensed by the first sensing channel. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
-
-
11. A non-transitory, computer-readable storage medium storing a set of instructions that cause a leadless, intracardiac pacemaker implanted in an atrium of a patient'"'"'s heart to perform a method, the method comprising:
-
sensing an electrical signal generated by the heart with two electrodes and at least one of a first sensing channel of the pacemaker configured to sense P-waves and reject far-field R-waves or a second sensing channel of the pacemaker configured to sense both P-waves and far-field R-waves; comparing, with a processor in the pacemaker, a first timing marker from the first sensing channel with a second timing marker from the second sensing channel; and either; determining, with the processor, that the sensed signal is a P-wave, if the first and second timing markers indicate that the sensed signal was sensed by the first and second sensing channels within a predetermined threshold of time from one another;
ordetermining, with the processor, that the sensed signal is a far-field R-wave, if the sensed signal is sensed by the second sensing channel and not sensed by the first sensing channel. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20)
-
-
21. An implantable leadless pacemaker device, comprising:
-
a housing; at least one attachment member on the housing for attaching the pacemaker device to an inner wall of a heart; a first electrode; a second electrode; a first sensing channel in the housing, configured to sense P-waves and having a first band-pass filter with a frequency range of approximately with a low end of approximately 10 Hz to approximately 40 Hz and a high end of greater than approximately 30 Hz and a low sensitivity threshold of about 1 mV; a second sensing channel in the housing, configured to sense far-field R-waves and P-waves and having a second band-pass filter with a frequency range with a low end of approximately 0.5 Hz to approximately 20 Hz and a high end of greater than approximately 20 Hz and a high sensitivity threshold of about 0.15 mV; and a processor configured to distinguish between P-waves and far-field R-waves based on data from the sensing channels and to generate a timing signal for timing atrial pacing therapy delivered by the pacemaker. - View Dependent Claims (22, 23, 24)
-
-
25. An intracardiac pacemaker system, comprising:
-
an implantable, leadless, atrial pacemaker device, comprising; a housing; at least one attachment member on the housing for attaching the pacemaker device to an inner wall of a heart; a first electrode; a second electrode; a first sensing channel in the housing, configured to sense P-waves and having a first band-pass filter with a frequency range with a low end of approximately 10 Hz to approximately 40 Hz and a high end of greater than approximately 30 Hz and a low sensitivity threshold of about 1 mV; a second sensing channel in the housing, configured to sense far-field R-waves and P-waves and having a second band-pass filter with a frequency range with a low end of approximately 0.5 Hz to approximately 20 Hz and a high end of greater than approximately 20 Hz and a high sensitivity threshold of about 0.15 mV; and a processor configured to distinguish between P-waves and far-field R-waves based on data from the sensing channels and to generate a timing signal for timing atrial pacing therapy delivered by the pacemaker; and an implantable, leadless, ventricular pacemaker device. - View Dependent Claims (26, 27, 28)
-
-
29. An implantable leadless pacemaker device, comprising:
-
a housing; at least one attachment member on the housing for attaching the pacemaker device to an inner wall of a heart; a first electrode; a second electrode; and a processor configured to process data sensed by the electrodes and converted to digital data to distinguish between P-waves and far-field R-waves, wherein the processor comprises; a first sensing channel, configured to sense P-waves and having a first band-pass filter with a frequency range with a low end of approximately 10 Hz to approximately 40 Hz and a high end of greater than approximately 30 Hz and a low sensitivity threshold of about 1 mV; and a second sensing channel, configured to sense far-field R-waves and P-waves and having a second band-pass filter with a frequency range with a low end of approximately 0.5 Hz to approximately 20 Hz and a high end of greater than approximately 20 Hz and a high sensitivity threshold of about 0.15 mV.
-
Specification