US 11,077,306 B2 · Heart rate based control of cardiac resynchronization therapy

Abstract

In some examples, controlling delivery of cardiac resynchronization therapy (CRT) includes storing, in a memory of an implantable medical device system and in association with each of a plurality of heart rates, at least one respective value for an interval between an atrial event and a ventricular event. Processing circuitry of the implantable medical device system may determine a heart rate of a patient and select one of the stored values for the interval between the atrial event and the ventricular event associated with the determined heart rate. The processing circuitry may further determine whether to control therapy delivery circuitry of the implantable medical device system to deliver fusion pacing or biventricular pacing, based on the selected one of the stored values for the interval between the atrial event and the ventricular event.

Claims11

Dependent claims

A system for controlling delivery of cardiac resynchronization therapy (CRT), the system comprising:

therapy delivery circuitry configured to deliver cardiac resynchronization pacing therapy to a heart of a patient;
sensing circuitry configured to sense electrical activity of the heart;
memory circuitry configured to store, in association with each of a plurality of heart rates, at least one respective value for an interval between an atrial event and a ventricular event;
and
processing circuitry configured to:
determine the heart rate of a patient based on the electrical activity sensed by the sensing circuitry;
select one of the stored values for the interval between the atrial event and the ventricular event associated with the determined heart rate;
and
determine whether to control the therapy delivery circuitry to deliver fusion pacing or biventricular pacing based on the selected one of the stored values for the interval between the atrial event and the ventricular event;
and
wherein the memory circuitry is configured to store, in association with each of the plurality of heart rates, a respective value for each of a first interval between an intrinsic atrial event and the ventricular event and a second interval between a paced atrial event and the ventricular event, and wherein the processing circuitry is configured to:
determine whether an atrial event for the current cardiac cycle was intrinsic or paced;
and
select either the value for the first interval or the value for the second interval based on the determination.

11 more elements

A system for controlling delivery of cardiac resynchronization therapy (CRT), the system comprising:

therapy delivery circuitry configured to deliver cardiac resynchronization pacing therapy to a heart of a patient;
sensing circuitry configured to sense electrical activity of the heart;
memory circuitry configured to store, in association with each of a plurality of heart rates, at least one respective value for an interval between an atrial event and a ventricular event;
and
processing circuitry configured to:
determine the heart rate of a patient based on the electrical activity sensed by the sensing circuitry;
select one of the stored values for the interval between the atrial event and the ventricular event associated with the determined heart rate;
and
determine whether to control the therapy delivery circuitry to deliver fusion pacing or biventricular pacing based on the selected one of the stored values for the interval between the atrial event and the ventricular event;
and
wherein the processing circuitry is further configured to periodically:
determine the heart rate of the patient;
select one of the stored values for the interval between the atrial event and the ventricular event associated with the determined heart rate;
control the therapy delivery circuitry to suspend the delivery of CRT;
while the delivery of CRT is suspended, measure a current value of the interval between the atrial event and the ventricular event;
compare the current value of the interval to the selected value of the interval;
and
update at least the selected value of the interval associated with the determined heart rate in the memory based on the comparison.

15 more elements

An implantable medical device (IMD) configured to deliver cardiac resynchronization therapy (CRT) to a patient, the IMD comprising:

a housing configured for implantation within the patient;
therapy delivery circuitry disposed within the housing and configured to deliver cardiac resynchronization pacing therapy to a heart of the patient;
sensing circuitry disposed within the housing and configured to sense electrical activity of the heart;
memory circuitry disposed within the housing and configured to store, in association with each of a plurality of heart rates, at least one respective value for an interval between an atrial event and a ventricular event;
and
processing circuitry disposed within the housing and configured to:
determine a first heart rate of the patient for at least one preceding cardiac cycle based on the sensed electrical activity;
select one of the stored values for the interval between the atrial event and the ventricular event associated with the determined heart rate;
and
determine whether to control the therapy delivery circuitry to deliver fusion pacing or biventricular pacing for a current cardiac cycle based on the selected one of the stored values for the interval between the atrial event and the ventricular event, wherein the processing circuitry is further configured to periodically, the period being greater than a cardiac cycle:
determine a second heart rate of the patient based on the sensed electrical activity;
select one of the stored values for the interval between the atrial event and the ventricular event associated with the determined heart rate;
suspend the delivery of CRT;
while the delivery of CRT is suspended, measure a current value of the interval between the atrial event and the ventricular event;
compare the current value of the interval to the selected value of the interval;
and
update at least the selected value of the interval associated with the determined heart rate in the memory based on the comparison.

14 more elements

Dependencies are inferred from the claim text.

Heart rate based control of cardiac resynchronization therapy

Life of this patent

Heart rate based control of cardiac resynchronization therapy

Life of this patent

Abstract

Claims11