Biventricular stimulation device with shortened inter-ventricular delay
First Claim
1. A biventricular cardiac stimulation device comprising:
- a pulse generator configured to interact respectively with ventricles of a heart to deliver stimulation pulses to each of the ventricles;
a control unit connected to the pulse generator that operates the pulse generator to emit a stimulation pulse to a first-stimulated ventricle, followed by a VV time delay, followed by a stimulation pulse to a second-stimulated ventricle;
an evoked response detector configured to interact with the ventricles and having independent, first and second ventricular sensing channels that detect ventricular evoked response in the respective ventricles, said evoked response detector searching for an evoked response following delivery of a stimulation pulse to said first-stimulated ventricle in an evoked response detection time window;
said control unit setting said VV time delay to be shorter than said evoked response detection time window; and
said evoked response detector closing said evoked response detecting time window, or discarding detections therein, in response to emission of the stimulation pulse to the second-stimulated ventricle during said evoked response detection time window following said first-stimulated ventricle.
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Abstract
A biventricular cardiac stimulation device has a pulse generator for delivering stimulation pulses at least to the ventricles of a patient'"'"'s heart. An evoked response detector has independent first and second ventricular sensing channels for ventricular evoked response detection in the ventricles. The pulse generator is controlled to deliver stimulation pulses to the second ventricle with a VV time delay after delivery of a stimulation pulse to the first-stimulated ventricle, the VV time delay being shorter than an evoked response detection time window that follows delivery of the stimulation pulse to the first-stimulated ventricle. An evoked response detector closes the evoked response detection window, or discards detections therein, in response to the emission of a stimulation pulse to the second-stimulated ventricle during the evoked response detection time window of the first-stimulated ventricle.
18 Citations
12 Claims
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1. A biventricular cardiac stimulation device comprising:
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a pulse generator configured to interact respectively with ventricles of a heart to deliver stimulation pulses to each of the ventricles; a control unit connected to the pulse generator that operates the pulse generator to emit a stimulation pulse to a first-stimulated ventricle, followed by a VV time delay, followed by a stimulation pulse to a second-stimulated ventricle; an evoked response detector configured to interact with the ventricles and having independent, first and second ventricular sensing channels that detect ventricular evoked response in the respective ventricles, said evoked response detector searching for an evoked response following delivery of a stimulation pulse to said first-stimulated ventricle in an evoked response detection time window; said control unit setting said VV time delay to be shorter than said evoked response detection time window; and said evoked response detector closing said evoked response detecting time window, or discarding detections therein, in response to emission of the stimulation pulse to the second-stimulated ventricle during said evoked response detection time window following said first-stimulated ventricle. - View Dependent Claims (2, 3, 4, 5)
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6. A method for biventricular cardiac stimulation comprising the steps of:
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with an implanted pulse generator, automatically delivering stimulation pulses respectively to the ventricles of a heart; automatically controlling operation of the pulse generator to emit a stimulation pulse to a first-stimulated ventricle, followed by a VV time delay, followed by a stimulation pulse to a second-stimulated ventricle; with an implanted evoked response detector having independent, first and second ventricular sensing channels, automatically detecting ventricular evoked response in the respective ventricles by searching for an evoked response following delivery of a stimulation pulse to said first-stimulated ventricle in an evoked response detection time window; with said control unit, setting said VV time delay to be shorter than said evoked response detection time window; and automatically causing said evoked response detector to close said evoked response detecting time window, or to discard detections therein, in response to emission of the stimulation pulse to the second-stimulated ventricle during said evoked response detection time window following said first-stimulated ventricle. - View Dependent Claims (7, 8, 9, 10, 11, 12)
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Specification