Time domain monitoring of myocardial electrical stability
First Claim
1. In an implantable system, a method for time domain monitoring of myocardial electrical stability, comprising:
- (a) pacing a patient'"'"'s heart for a period of time using a patterned pacing sequence that repeats every N beats, where N is an integer that is at least 3;
(b) obtaining an electrical signal that is representative of a plurality of consecutive beats of the patient'"'"'s heart while the patient'"'"'s heart is being paced using the patterned pacing sequence that repeats every N beats;
(c) dividing the plurality of consecutive beats into a plurality of sets of N consecutive beats;
(d) for each set of N consecutive beats, of the plurality of sets of N consecutive beats, determining one or more pairwise combination of consecutive pairs of beats within the set of N consecutive beats;
(e) cumulative averaging or cumulative summing corresponding pairwise combinations determined for the plurality of sets of N consecutive beats to thereby produce a plurality of cumulative values; and
(f) monitoring myocardial electrical stability based on the cumulative values;
wherein steps (b), (c), (d), (e) and (f) are all performed in the time domain without any transformation into the frequency domain.
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Abstract
Embodiments of the present invention relate to implantable systems, and methods for use therewith, for monitoring myocardial electrical stability. A patient'"'"'s heart is paced for a period of time using a patterned pacing sequence that repeats every N beats, and an electrical signal is obtained that is representative of a plurality of consecutive beats of the patient'"'"'s heart while it is being paced using the patterned pacing sequence that repeats every N beats. Myocardial electrical stability is then analyzed using time domain techniques that are tailored to the patterned pacing sequence used to pace the patient'"'"'s heart. In other embodiments, the patient'"'"'s heart need not be paced. This abstract is not intended to be a complete description of, or limit the scope of, the invention.
29 Citations
20 Claims
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1. In an implantable system, a method for time domain monitoring of myocardial electrical stability, comprising:
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(a) pacing a patient'"'"'s heart for a period of time using a patterned pacing sequence that repeats every N beats, where N is an integer that is at least 3; (b) obtaining an electrical signal that is representative of a plurality of consecutive beats of the patient'"'"'s heart while the patient'"'"'s heart is being paced using the patterned pacing sequence that repeats every N beats; (c) dividing the plurality of consecutive beats into a plurality of sets of N consecutive beats; (d) for each set of N consecutive beats, of the plurality of sets of N consecutive beats, determining one or more pairwise combination of consecutive pairs of beats within the set of N consecutive beats; (e) cumulative averaging or cumulative summing corresponding pairwise combinations determined for the plurality of sets of N consecutive beats to thereby produce a plurality of cumulative values; and (f) monitoring myocardial electrical stability based on the cumulative values; wherein steps (b), (c), (d), (e) and (f) are all performed in the time domain without any transformation into the frequency domain. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. An implantable system for time domain monitoring of myocardial electrical stability, comprising:
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one or more pulse generator configured to pace a patient'"'"'s heart for a period of time using a patterned pacing sequence that repeats every N beats, where N is an integer that is at least 3; one or more sensing circuit configured to obtain an electrical signal that is representative of a plurality of consecutive beats of the patient'"'"'s heart while the patient'"'"'s heart is being paced using the patterned pacing sequence that repeats every N beats; a controller configured to, in the time domain without any transformation into the frequency domain, divide the plurality of consecutive beats into a plurality of sets of N consecutive beats; for each set of N consecutive beats, of the plurality of sets of N consecutive beats, determine one or more pairwise combinations of consecutive pairs of beats within the set of N consecutive beats; cumulative average or cumulative sum corresponding pairwise combinations determined for the plurality of sets of N consecutive beats to thereby produce a plurality of cumulative values; and monitor myocardial electrical stability based on the cumulative values. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20)
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Specification