Hemodynamic performance enhancement through asymptomatic diaphragm stimulation
First Claim
1. An implantable medical system for improving a cardiovascular performance of a subject through electrical diaphragmatic stimulation, the implantable medical system comprising:
- a sensing and stimulation structure configured to be coupled to a diaphragm of the subject, to sense cardiac activity through the diaphragm, and to deliver electrical stimulation to the diaphragm, anda circuit structure coupled to the sensing and stimulation structure, the circuit structure configured to receive sensed cardiac activity from the sensing and stimulation structure, to note a cardiac event in a cardiac cycle of the subject based on the sensed cardiac activity, and to apply, in response to the noted cardiac event, an electrical stimulation to the sensing and stimulation structure in a timed relationship to the noted cardiac event to thereby induce motion of the diaphragm.
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Accused Products
Abstract
An implantable system, and methodology, for improving a heart'"'"'s hemodynamic performance featuring (a) bimodal electrodes placeable on the diaphragm, out of contact with the heart, possessing one mode for sensing cardiac electrical activity, and another for applying cardiac-cycle-synchronized, asymptomatic electrical stimulation to the diaphragm to trigger biphasic, diaphragmatic motion, (b) an accelerometer adjacent the electrodes for sensing both heart sounds, and stimulation-induced diaphragmatic motion, and (c) circuit structure, connected both to the electrodes and the accelerometer, operable, in predetermined timed relationships to the presences of valid V-events noted in one of sensed electrical and sensed mechanical, cardiac activity, to deliver diaphragmatic stimulation. The circuit structure includes accelerometer-linked computer structure for enabling selective review, for later operational modifications, of stimulation-produced diaphragmatic motions, and in a modified form, may additionally include timing-adjustment substructure capable of making adjustments in the mentioned timed relationships.
115 Citations
14 Claims
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1. An implantable medical system for improving a cardiovascular performance of a subject through electrical diaphragmatic stimulation, the implantable medical system comprising:
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a sensing and stimulation structure configured to be coupled to a diaphragm of the subject, to sense cardiac activity through the diaphragm, and to deliver electrical stimulation to the diaphragm, and a circuit structure coupled to the sensing and stimulation structure, the circuit structure configured to receive sensed cardiac activity from the sensing and stimulation structure, to note a cardiac event in a cardiac cycle of the subject based on the sensed cardiac activity, and to apply, in response to the noted cardiac event, an electrical stimulation to the sensing and stimulation structure in a timed relationship to the noted cardiac event to thereby induce motion of the diaphragm. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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Specification