Hemodynamic performance enhancement through asymptomatic diaphragm stimulation
First Claim
1. A fully implantable medical system comprising:
- bimodal electrode structure, placeable in contact with a selected surface region of a subject'"'"'s diaphragm at a location out of contact with the subject'"'"'s heart, and having one operating mode for sensing cardiac-cycle electrical activity discernible at the selected surface region, and another, independent, operating mode for applying asymptomatic electrical stimulation to the diaphragm at the selected surface region; and
electrical circuit structure operatively connected to the electrode structure for receiving therefrom information corresponding to the subject'"'"'s cardiac-cycle electrical activity sensed by the electrode structure, the electrical circuit structure operable to note a presence of a valid electrical V-event in such received cardiac-cycle electrical-activity information, and to deliver asymptomatic, cardiac-cycle-synchronized, electrical stimulation through the electrode structure to the diaphragm in a predetermined timed relationship to the valid electrical V-event, the electrical stimulation for a purpose of triggering a biphasic motion of the diaphragm, which biphasic motion comprises a caudal motion of the diaphragm followed by a cranial 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.
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Citations
10 Claims
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1. A fully implantable medical system comprising:
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bimodal electrode structure, placeable in contact with a selected surface region of a subject'"'"'s diaphragm at a location out of contact with the subject'"'"'s heart, and having one operating mode for sensing cardiac-cycle electrical activity discernible at the selected surface region, and another, independent, operating mode for applying asymptomatic electrical stimulation to the diaphragm at the selected surface region; and electrical circuit structure operatively connected to the electrode structure for receiving therefrom information corresponding to the subject'"'"'s cardiac-cycle electrical activity sensed by the electrode structure, the electrical circuit structure operable to note a presence of a valid electrical V-event in such received cardiac-cycle electrical-activity information, and to deliver asymptomatic, cardiac-cycle-synchronized, electrical stimulation through the electrode structure to the diaphragm in a predetermined timed relationship to the valid electrical V-event, the electrical stimulation for a purpose of triggering a biphasic motion of the diaphragm, which biphasic motion comprises a caudal motion of the diaphragm followed by a cranial motion of the diaphragm. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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Specification