Ventricular rate stabilization
AssigneeMedtronic, Inc.
InventorsGiorgio Corbucci, Wim Bout
Life of this patent
Estimating the term…
Abstract
Techniques for stabilizing the rate of a ventricle, during conducted atrial fibrillation for example, adjust the escape interval of an implantable medical device to increase or decrease the pacing rate. In some embodiments, the escape interval is adjusted to achieve and maintain a percentage of pacing. In other embodiments, the stability of the ventricular rate is quantified as a function of measured R-R intervals, and the escape interval is adjusted to achieve and maintain a level of stability. In still other embodiments, a mean compensatory pause length is determined, and the escape interval is adjusted as a function of the mean compensatory pause length, to maintain the escape interval at or near the mean compensatory pause length.
Claims61
A method comprising:
- detecting occurrences of a plurality of depolarizations within a ventricle;
- determining whether each of the depolarizations was caused by a pacing pulse;
- identifying a subset of the depolarizations as a function of the determination;
- and
- adjusting an escape interval as a function of the subset.
A method comprising:
- detecting an occurrence of a depolarization within a ventricle;
- measuring an R-R interval length for the depolarization;
- determining whether the R-R interval length falls within a range of R-R interval lengths;
- and
- adjusting an escape interval as a function of the determination.
A method comprising:
- measuring a length of each of a plurality of compensatory pauses;
- calculating an average length as a function of the lengths of the measured compensatory pauses;
- comparing the average length to an escape interval;
- and
- adjusting the escape interval as a function of the comparison.
An implantable medical device comprising:
- an electrode to deliver pacing pulses to a ventricle of a heart and to sense electrical activity within the ventricle;
- and
- a processor to detect occurrences of a plurality of depolarizations of the ventricle as a function of the electrical activity, to determine whether each of the depolarizations was caused by a pacing pulse delivered by the first electrode, to identify a subset of the depolarizations as a function of the determination, and to adjust an escape interval as a function of the subset.
An implantable medical device comprising:
- an electrode to sense electrical activity within a ventricle;
- and
- a processor to detect occurrences of a plurality of depolarizations of the ventricle as a function of the electrical activity, to measure an R-R interval length of a depolarization, to determine whether the R-R interval length falls within a range of R-R interval lengths, and to adjust an escape interval as a function of the determination.
An implantable medical device comprising:
- an electrode to deliver pacing pulses to a ventricle of a heart and to sense electrical activity within the ventricle;
- and
- a processor to detect occurrences of depolarizations of the ventricle as a function of the electrical activity, to measure a length of each of a plurality of compensatory pauses as a function of the depolarizations, to calculate an average length as a function of the lengths of the measured compensatory pauses, to compare the average length to an escape interval, and to adjust the escape interval as a function of the comparison.
A computer-readable medium comprising instructions that cause a processor to:
- receive signals indicating occurrences of a plurality of depolarizations of a ventricle;
- determine whether each of the depolarizations was caused by a pacing pulse delivered to the ventricle as a function of the signals;
- identify a subset of the depolarizations as a function of the determination;
- and
- adjust an escape interval as a function of the subset.
A computer-readable medium comprising instructions that cause a processor to:
- receive signals indicating occurrences of a plurality of depolarizations of a ventricle;
- measure an R-R interval length of each of the depolarizations as a function of the signals;
- determine whether each of the R-R interval lengths falls within a range of R-R interval lengths;
- identify a subset of the depolarizations as a function of the determination;
- and
- adjust an escape interval as a function of the subset.
A computer-readable medium comprising instructions that cause a processor to:
- receive signals indicating occurrences of a plurality of depolarizations of a ventricle;
- measure a length of each of a plurality of compensatory pauses as a function of the signals;
- calculate an average length as a function of the lengths of the measured compensatory pauses;
- compare the average length to an escape interval;
- and
- adjust the escape interval as a function of the comparison.
An implantable medical device comprising:
- means to detect occurrences of a plurality of depolarizations within a ventricle;
- means to determine whether each of the depolarizations was caused by a pacing pulse;
- means to identify a subset of the depolarizations as a function of the determination;
- and
- means to adjust an escape interval as a function of the subset.
An implantable medical device comprising:
- means to detect occurrences of a plurality of depolarizations within a ventricle;
- means to measure an R-R interval length of each of the depolarizations;
- means to determine whether each of the R-R interval lengths falls within a range of R-R interval lengths;
- means to identify a subset of the depolarizations as a function of the determination;
- and
- means to adjust an escape interval as a function of the subset.
An implantable medical device comprising:
- means to detect occurrences of a plurality of depolarizations within a ventricle;
- means to measure a length of each of a plurality of compensatory pauses as a function of the depolarizations;
- means to calculate an average length as a function of the lengths of the measured compensatory pauses;
- means to compare the average length to an escape interval;
- and
- means to adjust the escape interval as a function of the comparison.
Dependencies are inferred from the claim text.