Method of delivering PESP/ICC as well as adjusting the refractory period of the heart
First Claim
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1. A medical device for treating cardiac dysfunction, comprising:
- implantable sensor means for obtaining one or more cardiac parameters of a patient;
a processor means for processing the one or more cardiac parameters to determine whether cardiac dysfunction is present;
therapy delivery means for delivering therapies upon a determination of cardiac dysfunction being present, the delivered therapies comprising both stimulation of excitable tissue to treat the cardiac dysfunction and modulation of the excitable tissue'"'"'s effective refractory periods to achieve a desired effective refractory period; and
wherein the stimulation to treat the cardiac dysfunction comprises post extrasystolic potentiation, and wherein the refractory period modulation comprises refractory period stimulation shortening of one or more of an initial refractory period and a secondary refractory period.
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Abstract
Medical devices and methods are used to treat cardiac dysfunction conditions which involve delivery of stimulation pulses in cardiac refractory periods in order to modulate an effective refractory period (ERP). Such devices and methods may be used in conjunction with or in place of other therapies, including increased cardiac contractility (ICC) therapy, post extrasystolic potentiation (PESP) therapy, and other therapies to achieve increased heart contractility, provide a safer and more effective regimen for the corresponding stimulation therapies, and reduce the risk of inducing an arrhythmia.
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Citations
8 Claims
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1. A medical device for treating cardiac dysfunction, comprising:
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implantable sensor means for obtaining one or more cardiac parameters of a patient; a processor means for processing the one or more cardiac parameters to determine whether cardiac dysfunction is present; therapy delivery means for delivering therapies upon a determination of cardiac dysfunction being present, the delivered therapies comprising both stimulation of excitable tissue to treat the cardiac dysfunction and modulation of the excitable tissue'"'"'s effective refractory periods to achieve a desired effective refractory period; and wherein the stimulation to treat the cardiac dysfunction comprises post extrasystolic potentiation, and wherein the refractory period modulation comprises refractory period stimulation shortening of one or more of an initial refractory period and a secondary refractory period. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A medical device for treating cardiac dysfunction, comprising:
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implantable sensor means for obtaining one or more cardiac parameters of a patient; a processor means for processing the one or more cardiac parameters to determine whether cardiac dysfunction is present; therapy delivery means for delivering therapies upon a determination of cardiac dysfunction being present, the delivered therapies comprising; non-excitory stimulation comprising delivery of a first one or more stimulation pulses to excitable tissue to treat the cardiac dysfunction; and refractory period stimulation comprising delivery of a second one or more stimulation pulses to elongate the effective refractory period of the excitable tissue and wherein the second one or more stimulation pulses have one or more of a lower amplitude, a lower duration, a higher polarity in part, and a lower frequency than that contained in the first one or more stimulation pulses.
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Specification