Shibaji Shome

US Patent:

8306622, Nov 6, 2012

Filed:

Sep 28, 2010

Appl. No.:

12/892378

Inventors:

Shibaji Shome - Minneapolis MN, US
Yanting Dong - Shoreview MN, US

Assignee:

Cardiac Pacemakers, Inc. - St. Paul MN

International Classification:

A61N 1/00

US Classification:

607 28

Abstract:

A method and device to detect and compare changes in atrial rate and morphology can be used to identify left atrial sense and capture, such as from a quadripolar or other lead located in or around the coronary sinus.

US Patent:

8401639, Mar 19, 2013

Filed:

Mar 16, 2010

Appl. No.:

12/724729

Inventors:

Aaron R. McCabe - Minneapolis MN, US
Shibaji Shome - Minneapolis MN, US
Yanting Dong - Shoreview MN, US
Amy Jean Brisben - St. Paul MN, US

Assignee:

Cardiac Pacemakers, Inc. - St. Paul MN

International Classification:

A61N 1/39

US Classification:

607 9

Abstract:

Cardiac resynchronization therapy is delivered to a heart using an extended bipolar electrode configuration in accordance with programmed pacing parameters including a non-zero intraventricular delay. The extended bipolar electrode configuration comprises a left ventricular electrode defining a cathode of the extended bipolar electrode configuration and a right ventricular electrode defining an anode of the extended bipolar electrode configuration. A pace pulse is delivered to the left ventricular electrode and anodal stimulation of the right ventricle is detected based on the sensed response to the pace pulse.

US Patent:

8494619, Jul 23, 2013

Filed:

May 17, 2010

Appl. No.:

12/781411

Inventors:

Theodore J. Schulte - Austin TX, US
Yanting Dong - Shoreview MN, US
Shibaji Shome - Minneapolis MN, US
Abhilash Patangay - Inver Grove Heights MN, US

Assignee:

Cardiac Pacemakers, Inc. - St. Paul MN

International Classification:

A61B 5/0452

US Classification:

600509

Abstract:

In an example, a cardiac rhythm management system includes an implantable physiological data monitor, a processor, a memory, and a display. The implantable physiological data monitor can be configured to monitor a plurality of cardiac responses. The processor can be configured to classify the cardiac response into one of at least three classes including pace-dominant, fusion, and pseudo-fusion. The processor can also be configured to calculate statistical information regarding the classified cardiac responses. In this example, the pace-dominant, fusion, and pseudo-fusion classes correspond to a cardiac response resulting from a corresponding electrostimulation. The memory is configured to store the classified cardiac responses and calculated statistical information for future use by the processor or for display. The display is configured to display the statistical information stored in the memory for diagnostic and device programming purposes.

US Patent:

8565879, Oct 22, 2013

Filed:

Mar 25, 2011

Appl. No.:

13/071680

Inventors:

Amy Jean Brisben - Saint Paul MN, US
Shibaji Shome - Arden Hills MN, US
Kenneth N. Hayes - Blaine MN, US
Yanting Dong - Shoreview MN, US
Aaron R. McCabe - Minneapolis MN, US
Scott A. Meyer - Lakeville MN, US
Kevin John Stalsberg - White Bear Lake MN, US

Assignee:

Cardiac Pacemakers, Inc. - St. Paul MN

International Classification:

A61N 1/08

US Classification:

607 28, 607 27, 607 9

Abstract:

An apparatus comprises a cardiac signal sensing circuit, a pacing therapy circuit, and a controller circuit. The controller circuit includes a safety margin calculation circuit. The controller circuit initiates delivery of pacing stimulation energy to the heart using a first energy level, changes the energy level by at least one of: a) increasing the energy from the first energy level until detecting that the pacing stimulation energy induces stable capture, or b) reducing the energy from the first energy level until detecting that the stimulation energy fails to induce capture, and continues changing the stimulation energy level until confirming stable capture or the failure of capture. The safety margin calculation circuit calculates a safety margin of pacing stimulation energy using at least one of a determined stability of a parameter associated with evoked response and a determined range of energy levels corresponding to stable capture or intermittent failure of capture.

US Patent:

8565880, Oct 22, 2013

Filed:

Apr 26, 2011

Appl. No.:

13/094416

Inventors:

Yanting Dong - Shoreview MN, US
Allan C. Shuros - St. Paul MN, US
Jiang Ding - Shoreview MN, US
Scott A. Meyer - Lakeville MN, US
Shibaji Shome - Arden Hills MN, US

Assignee:

Cardiac Pacemakers, Inc. - St. Paul MN

International Classification:

A61N 1/36

US Classification:

607 28, 607 9

Abstract:

This document discusses, among other things, a system and method for generating a stimulation energy to provide His-bundle stimulation for a cardiac cycle, receiving electrical information from the heart over at least a portion of the cardiac cycle, determining a characteristic of at least a portion of the received electrical information for the cardiac cycle, and classifying the cardiac cycle using the determined characteristic.

US Patent:

20100312130, Dec 9, 2010

Filed:

Aug 20, 2010

Appl. No.:

12/860152

Inventors:

Yi Zhang - Plymouth MN, US
Kent Lee - Shoreview MN, US
Shibaji Shome - Minneapolis MN, US
Qi An - New Brighton MN, US
Ramesh Wariar - Blaine MN, US

International Classification:

A61B 5/02

US Classification:

600508

Abstract:

Severity and confidence level of a myocardial ischemia event can be determined, such as including using an ambulatory medical device, and such information can be used to determine a graded response to the myocardial ischemia event.

US Patent:

20110004264, Jan 6, 2011

Filed:

Jun 24, 2010

Appl. No.:

12/822487

Inventors:

Krzysztof Z. Siejko - Maple Grove MN, US
Shibaji Shome - Minneapolis MN, US
Jiang Ding - Shoreview MN, US

International Classification:

A61N 1/08

US Classification:

607 28

Abstract:

Approaches to rank potential left ventricular (LV) pacing vectors are described. Early elimination tests are performed to determine the viability of LV cathode electrodes. Some LV cathodes are eliminated from further testing based on the early elimination tests. LV cathodes identified as viable cathodes are tested further. Viable LV cathode electrodes are tested for hemodynamic efficacy. Cardiac capture and phrenic nerve activation thresholds are then measured for potential LV pacing vectors comprising a viable LV cathode electrode and an anode electrode. The potential LV pacing vectors are ranked based on one or more of the hemodynamic efficacy of the LV cathodes, the cardiac capture thresholds, and the phrenic nerve activation thresholds.

US Patent:

20110071413, Mar 24, 2011

Filed:

Sep 23, 2010

Appl. No.:

12/888900

Inventors:

Yi Zhang - Plymouth MN, US
Shibaji Shome - Minneapolis MN, US
Kritika Gupta - Durham NC, US
Dan Li - Shoreview MN, US
Julie A. Thompson - Circle Pines MN, US

International Classification:

A61B 5/0452
A61N 1/365

US Classification:

600509, 607 17

Abstract:

An apparatus comprises an ambulatory cardiac signal sensing circuit configured to provide an electrical cardiac signal representative of cardiac activity of a subject and processor. The processor includes a feature module, a correlation module, and an ischemia detection module. The feature module is configured to identify a fiducial feature in the cardiac signal and locate one or more cardiac features in the cardiac signal using the fiducial feature. The correlation module is configured to calculate a measure of similarity of morphology for a segment of the cardiac signal that includes the cardiac features. The ischemia detection module is configured to detect a change in the measure of similarity and determine whether the detected change in the measure of similarity is indicative of ischemia.