Medtronic, Inc.

William J Schindeldecker

Scott J Brabec

Ronald A Drake

Kathryn Hilpisch

Kenneth R Brennen

John Louis Sommer

Kevin R Seifert

Stanten C Spear

Melissa G T Christie

Douglas S Hine

Brian P Colin

Jordon D Honeck

James Strom

Alexander R Mattson

Roger E Rugland

Bushan K Purushothaman

Bruce C Johnson

Stephanie Koppes

An intracardiac ventricular pacemaker includes a pulse generator for delivering ventricular pacing pulses, an impedance sensing circuit, and a control circuit in communication with the pulse generator and the impedance sensing circuit. The pacemaker is configured to produce an intraventricular impedance signal, detect an atrial systolic event using the intraventricular impedance signal, set an atrioventricular pacing interval in response to detecting the atrial systolic event, and deliver a ventricular pacing pulse in response to the atrioventricular pacing interval expiring.

Method and apparatus for atrial event detection

A device for delivering an implantable medical device (IMD) includes an elongated member and a deployment bay configured to house the IMD, the deployment bay defining a distal opening for deploying the IMD out of the deployment bay. The device includes a first electrode located inside the deployment bay during intravascular navigation, a second electrode, and impedance detection circuitry configured to deliver an electrical signal to a path between the first electrode and the second electrode through at least one of a fluid or tissue of the patient. The device also includes processing circuitry configured to determine an impedance of the path based on the signal and control a user interface to indicate when an impedance of the path indicates that at least one of the IMD or the distal opening is in a fixation configuration relative to the target site of the patient.

Impedance-based verification for delivery of implantable medical devices

An insulative housing formed about a distal end of a medical electrical lead body includes a cavity and a port; an ionically conductive medium fills the cavity and is in intimate contact with an electrode surface contained within the cavity. When a current is delivered to the electrode surface contained within the cavity, a first current density generated at the electrode surface is smaller than a second current density generated out from the port of the insulative housing; thus, the port forms a high impedance and low polarization tissue-stimulating electrode.

High impedance and low polarization electrode

An implantable pacemaker is provided with subcutaneous spiral electrodes for sensing electrical signals of the heart. Subcutaneous spirals or spiral electrodes are embedded individually into three or four recessed casings placed in a compliant surround that is attached to the perimeter of the implanted medical device. The electrodes are electrically connected to the circuitry of the implanted pacemaker and detect cardiac depolarization waveforms displayable as electrocardiographic tracings on an external instrument such as a programmer. The spiral electrode constitutes the proximal end of a continuous wire that upon egress from the recessed casing is insulated using insulative material.

Subcutaneous spiral electrode for sensing electrical signals of the heart

A medical electrical lead having an elongated insulative sheath carrying an elongated electrical conductor therein and having a drug-dispensing electrode assembly coupled to a distal end of the elongated conductor. The electrode assembly takes the form of a conductive electrode member having a distal electrode portion exposed exterior to the elongated sheath and a shank portion extending proximally from the distal portion and coupled to the elongated conductor. A drug release device is mounted around the shank proximal to the distal portion of the electrode member and the electrode member is provided with at least one bore extending from a surface of the release device to a surface of the distal portion of the electrode member.

Steroid elution electrodes LVCV, left atrial medical/elecrical leads

A method of fabricating a stimulation electrode for use on an implantable lead, the lead and electrode so fabricated and a method of their use. The electrode is made by coating a conductive electrode member with a coating of a high surface area coating having micron or sub-micron surface features and after coating, plasma cleaning the electrode member. The electrode is coupled to an insulated conductor of an implantable lead and is employed to stimulate body tissue. The high surface area coating may be platinum black, ruthenium oxide, another metal oxide, a metal nitride or the like. Steroid may be applied to the electrode member after coating.

Method for tissue stimulation and fabrication of low polarization implantable stimulation electrode

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Foreston, MN, United States of America

William J Schindeldecker