US 8,755,884 B2 · Methods for promoting intrinsic activation in single chamber implantable cardiac pacing systems

Abstract

Cardiac pacing methods for an implantable single chamber pacing system, establish an offset rate for pacing at a predetermined decrement from either a baseline rate (i.e. dictated by a rate response sensor), or an intrinsic rate. Pacing maintains the offset rate until x of y successive events are paced events, at which time the offset rate is switched to the baseline rate for pacing over a predetermined period of time. Following the period, if an intrinsic event is not immediately detected, within the interval of the offset rate, the rate is switched back to baseline for pacing over an increased period of time. Some methods establish a preference rate, between the offset and baseline rates, wherein an additional criterion, for switching from the offset rate to the baseline rate, is established with respect to the preference rate.

Claims10

Dependent claims

A method for rate adaptive cardiac pacing that employs implanted electrodes for single chamber pacing and sensing, and the method comprising the steps of:

establishing a baseline rate for pacing stimulation;
establishing an offset rate for pacing stimulation, the offset rate being lower than the baseline rate;
sensing for intrinsic events by means of the implanted electrodes;
applying a pacing stimulation pulse by means of the implanted electrodes to maintain the offset rate;
establishing a preference rate that falls between the baseline rate and the offset rate;
and
switching from the offset rate to the baseline rate and pacing at the baseline rate in response to intrinsic events meeting a criterion with respect to the preference rate, the criterion being one of:
x of y successive intrinsic events falling below the preference rate, x being greater than one and y being greater than or equal to x;
and a measure of central tendency of the rates of successive intrinsic events falling below the preference rate.

6 more elements

A single chamber cardiac pacing system configured to be wholly implanted against an endocardial or epicardial surface, the system including a pulse generator having one or more rate response sensors and a microprocessor element being preprogrammed to direct the pulse generator to execute a method comprising the following steps:

establishing a baseline rate for pacing stimulation;
establishing an offset rate for pacing stimulation, the offset rate being lower than the baseline rate;
sensing for intrinsic events by means of the implanted electrodes;
applying a pacing stimulation pulse by means of the implanted electrodes to maintain the offset rate;
establishing a preference rate that falls between the baseline rate and the offset rate;
and
switching from the offset rate to the baseline rate and pacing at the baseline rate in response to intrinsic events meeting a criterion with respect to the preference rate, the criterion being one of:
x of y successive intrinsic events falling below the preference rate, x being greater than one and y being greater than or equal to x;
and a measure of central tendency of the rates of successive intrinsic events falling below the preference rate.

6 more elements

Dependencies are inferred from the claim text.

Methods for promoting intrinsic activation in single chamber implantable cardiac pacing systems

Life of this patent

Methods for promoting intrinsic activation in single chamber implantable cardiac pacing systems

Life of this patent

Abstract

Claims10