Medtronic, Inc.

Other

Todd Jon Sheldon

Wade M Demmer

Vincent E Splett

Yong Kyun Cho

Mark K Erickson

Paul R Solheim

Robert A Betzold

Juliana E Pronovici

Michael O Sweeney

Saul E Greenhut

James D Reinke

Hyun J Yoon

Robert W Stadler

Paul A Belk

Matthew David Bonner

Michael L Ellingson

Douglas A Hettrick

Vincent P Ganion

Jonathan D Edmonson

Matthew J Hoffman

Greggory R Herr

Karen J Kleckner

Jian L Cao

Thomas J Mullen

Eric R Williams

Ben W Herberg

Elizabeth A Mattson

Zhongping C Yang

Aleksandre T Sambelashvili

Scott R Stanslaski

Lee Stylos

Douglas A Peterson

John Charles Stroebel

James W Busacker

Keelia M Escalante

Noelle C Neafus

H Toby Markowitz

Xiaohong Zhou

William J Combs

Michael F Hess

Kathryn Hilpisch

John C Rueter

Yanina Grinberg

Shannon D Nelson

Purvee P Parikh

Maureen E Lybarger

James Kevin Carney

Paul J Degroot

Teresa A Whitman

David Arthur Casavant

Robert J Nehls

Ronan Wood

Steven R Hornberger

Shawn M Campbell

Margaret G Guo

Subham Ghosh

Jeffrey M Gillberg

Shantanu Sarkar

Thomas A Anderson

David A Anderson

Luc Roland Mongeon

Michael L Hudziak

Lynn A Davenport

Steven N Lu

Sameh Sowelam

Scott W Davie

Christopher M Manrodt

Alexander R Mattson

Keelia Doyle

Steven L Ning

David L Thompson

Xusheng Zhang

Eduardo N Warman

Can Cinbis

Mark L Brown

Troy Edward Jackson

Vladimir Pavlovich Nikolski

Raja N Ghanem

Michael D Eggen

Sean Ward

Michael W Heinks

Paul D Ziegler

David E Euler

Paula McDonnell

Rónán Wood

Bradley C Peck

Trent M Fischer

Daniel Robert Kaiser

Kevin A Wanasek

James J St Martin

Stefan Kracker

Harold Toby Markowitz

Michael Kemmerer

Jean E Hudson

Michelle M Galarneau

Donald James Ruzin

Michael A Reinert

Michael Andrew Reinert

David M Steinhaus

Raylene Pitschneider

An implantable medical device system includes an extracardiac sensing device and an intracardiac pacemaker. The sensing device senses a P-wave attendant to an atrial depolarization of the heart via housing-based electrodes carried by the sensing device when the sensing device is implanted outside the cardiovascular system and sends a trigger signal to the intracardiac pacemaker in response to sensing the P-wave. The intracardiac pacemaker detects the trigger signal and schedules a ventricular pacing pulse in response to the detected trigger signal.

Atrial synchronized ventricular pacing system

An intracardiac ventricular pacemaker is configured to operate in in a selected one of an atrial-tracking ventricular pacing mode and a non-atrial tracking ventricular pacing mode. A control circuit of the pacemaker determines at least one motion signal metric from the motion signal, compares the at least one motion signal metric to pacing mode switching criteria, and, responsive to the pacing mode switching criteria being satisfied, switches from the selected one of the non-atrial tracking pacing mode and the atrial tracking pacing mode to the other one of the non-atrial tracking pacing mode and the atrial tracking pacing mode for controlling ventricular pacing pulses delivered by the pacemaker.

Pacing mode switching in a ventricular pacemaker

A medical device is configured to identify a first group of cardiac events, determine a cardiac event interval based on the first group of cardiac events and determine whether the cardiac event interval is less than a threshold interval or greater than the threshold interval. The medical device is configured to select a first blanking period duration if the cardiac event interval is less than the threshold interval or a second blanking period duration if the cardiac event interval is greater than the threshold interval.

Post-ventricular atrial blanking in a cardiac device

A medical having a motion sensor is configured to set an atrial event sensing parameter used for sensing atrial event signals from a motion signal produced by the motion sensor. The medical device sets an atrial event sensing parameter by applying a sensing window during each one of multiple ventricular cycles, determining a feature of the motion signal during the sensing window for at least a portion of the ventricular cycles, and setting the atrial event sensing parameter based on the determined features. The medical device may sense the atrial event from the motion signal according to the atrial event sensing parameter.

Method and apparatus for establishing parameters for cardiac event detection

A medical device is configured to sense a cardiac electrical signal and determine from the cardiac electrical signal at least one of a maximum peak amplitude of a positive slope of the cardiac electrical signal and a maximum peak time interval from a pacing pulse to the maximum peak amplitude. The device is configured to determine a capture type of the pacing pulse based on at least one or both of the maximum peak amplitude and the maximum peak time interval.

His-Purkinje system capture detection

A medical device is configured to determine a rate smoothing pacing interval based on at a ventricular cycle length ending with a ventricular pacing pulse and determine a post-sense ventricular pacing interval based on a ventricular cycle length ending with a sensed ventricular event signal. The medical device may be configured to start a ventricular pacing interval set to the post-sense ventricular pacing interval in response to the sensed ventricular event signal and generate a ventricular pacing pulse in response to the expiration of the post-sense ventricular pacing interval.

Rate smoothing in atrial synchronous ventricular pacemaker

A medical device is configured to receive a cardiac signal and determine a morphology matching score from the cardiac signal and a capture detection morphology template that corresponds to a first type of cardiac pacing capture that includes capture of at least a first portion of the His-Purkinje system. The device is configured to detect a second type of cardiac pacing capture in response to the morphology matching score being less than the first match threshold. The second type of cardiac pacing capture is different than the first type of cardiac pacing capture and may include capture of the ventricular myocardium and/or a second portion of the His-Purkinje system different than the first portion.

This disclosure is directed to devices and techniques for classifying of pacing captures to evaluate effectiveness of pacing by a pacing device, such as an implantable medical device (IMD). An example system includes stimulation circuitry to generate a pacing stimulus, sensing circuitry to sense an evoked response after the pacing stimulus, and processing circuitry. The processing circuitry determines classification features from the evoked response and applies the classification features to a classification model, the classification model generated by a machine learning algorithm using one or more test sets comprising a plurality of sample evoked responses for each of a plurality of classifications. Based on the output of the model, the processing circuitry classifies the evoke response as one of the plurality of classifications.

Implantable medical device with pacing capture classification

A medical device is configured to sense a cardiac electrical signal and detect an atrial tachyarrhythmia based on the sensed cardiac electrical signal. The medical device is configured to determine that far field oversensing criteria are met by the cardiac electrical signal during the detected atrial tachyarrhythmia. The medical device may detect termination of the detected atrial tachyarrhythmia in response to the far field oversensing criteria being met.

Device and method for atrial tachyarrhythmia detection

Implantable medical systems enter an exposure mode of operation, either manually via a down linked programming instruction or by automatic detection by the implantable system of exposure to a magnetic disturbance. A controller then determines the appropriate exposure mode by considering various pieces of information including the device type including whether the device has defibrillation capability, pre-exposure mode of therapy including which chambers have been paced, and pre-exposure cardiac activity that is either intrinsic or paced rates. Additional considerations may include determining whether a sensed rate during the exposure mode is physiologic or artificially produced by the magnetic disturbance. When the sensed rate is physiologic, then the controller uses the sensed rate to trigger pacing and otherwise uses asynchronous pacing at a fixed rate.

Methods and implantable medical systems that implement exposure modes of therapy that allow for continued operation during exposure to a magnetic disturbance

An intracardiac ventricular pacemaker having a motion sensor, a pulse generator and a control circuit coupled to the pulse generator and the motion sensor is configured to identify a ventricular systolic event, detect a ventricular passive filling event signal from the motion signal, and determine a time interval from the ventricular systolic event to the ventricular passive filling event. The pacemaker establishes a minimum pacing interval based on the time interval.

Pacing mode switching and rate response limit in a ventricular pacemaker

A ventricular pacemaker is configured to determine a ventricular rate interval by determining at least one ventricular event interval between two consecutive ventricular events and determine a rate smoothing ventricular pacing interval based on the ventricular rate interval. The pacemaker is further configured to detect an atrial event from a sensor signal and deliver a ventricular pacing pulse in response to detecting the atrial event from the sensor signal. The pacemaker may start the rate smoothing ventricular pacing interval to schedule a next pacing pulse to be delivered upon expiration of the rate smoothing ventricular pacing interval.

Rate smoothing to enhance atrial synchronous pacing in a ventricular pacemaker

An implantable medical device is configured determine a numerical value of a variable that is monitored by the implantable medical device and convert the numerical value to a data sequence of modulated electrical stimulation rate intervals. The implantable medical device delivers electrical stimulation pulses according to the data sequence of modulated stimulation rate intervals to cause a modulated rate of activation of excitable tissue of a patient corresponding to the modulated stimulation rate intervals. The modulated rate of activation is detectable by a rate monitor for demodulation to the numerical value of the monitored variable data value. In some examples, the implantable medical device is a pacemaker delivering cardiac pacing pulses according to modulated pacing rate intervals to cause a modulated heart rate of the patient detectable by a heart rate monitor for demodulation to the numerical value of the monitored variable.

Electrical stimulation rate modulation for communication of data values in a medical device system

A medical device is configured to produce a cardiac motion signal by sampling a signal produced by an axis of a motion sensor, starting a blanking period, suspending the sampling of the signal during at least a portion of the blanking period, and restarting the sampling of the signal at the sampling frequency before the blanking period has expired. The medical device may detect a cardiac event from the cardiac motion signal and generate a pacing pulse in response to detecting the cardiac event in some examples.

Methods and apparatus for reducing current drain in a medical device

An intracardiac ventricular pacemaker is configured to detect a ventricular diastolic event from a motion signal received by a pacemaker control circuit from a motion sensor. The control circuit starts an atrial refractory period having an expiration time set based on a time of the detection of the ventricular diastolic event. The control circuit detects an atrial systolic event from the motion signal after expiration of the atrial refractory period and controls a pulse generator of the pacemaker to deliver a pacing pulse to a ventricle of a patient's heart at a first atrioventricular pacing time interval after the atrial systolic event detection.

Atrial tracking in an intracardiac ventricular pacemaker

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North Oaks, MN, United States of America

Todd Jon Sheldon