US Patent No: 5,725,562

Number of patents in Portfolio can not be more than 2000

Rate responsive cardiac pacemaker and method for discriminating stair climbing from other activities

1 Status Updates

Stats

ATTORNEY / AGENT: (SPONSORED)
 

Importance

Loading Importance Indicators... loading....

Abstract

A method of and apparatus for pacing a patient's heart at a pacing rate dependent on patient activity and posture particularly during stair climbing. A dual chamber, rate responsive pacemaker for pacing a patient's heart includes at least one DC accelerometer mounted in the pacemaker pulse generator for implantation such that the sensitive axis of the DC accelerometer is sensitive to the effects of gravity during forward lean of the patient characteristic of stair climbing posture. The DC and AC signal outputs of the accelerometer are processed to develop a tilt signal and an activity signal. A target rate control signal is derived from the activity signal dependent on the level of activity. A stair climbing rate is selected for controlling the physiologic pacing rate between a lower and an upper pacing rate in the presence of an activity signal indicative of a patient walking rate and a tilt signal value falling within a tilt window. The target rate control signal is used to control the pacing rate if the activity signal is indicative of faster patient movement, e.g. running, or if the tilt signal is outside the tilt window indicating that the patient is either upright or prone.

Loading the Abstract Image... loading....

First Claim

Related Publications

Loading Related Publications... loading....

Patent Owner(s)

Patent OwnerAddressTotal Patents
MEDTRONIC, INC.MINNEAPOLIS, MN4903

International Classification(s)

  • [Classification Symbol]
  • [Patents Count]

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Sheldon, Todd J North Oaks, MN 97 1305

Cited Art

Patent Info (Count) # Cites Year
 
MEDTRONIC, INC. (7)
4,374,382 Marker channel telemetry system for a medical device 195 1981
4,428,378 Rate adaptive pacer 282 1981
4,556,063 Telemetry system for a medical device 380 1984
5,031,618 Position-responsive neuro stimulator 165 1990
5,226,413 Rate responsive pacemaker and method for automatically initializing the same 64 1990
5,233,984 Implantable multi-axis position and activity sensor 92 1991
5,127,404 Telemetry format for implanted medical device 319 1991
 
PACESETTER, INC. (2)
4,771,780 Rate-responsive pacemaker having digital motion sensor 82 1987
5,010,893 Motion sensor for implanted medical device 70 1988
 
ADVANCED MEDICAL DEVICES, S.A. (1)
5,354,317 Apparatus and method for cardiac pacing responsive to patient position 85 1992
 
INTERMEDICS, INC. (1)
5,472,453 Medical interventional device with accelerometer for providing cardiac therapeutic functions 89 1994
 
MED REL, INC. (1)
4,257,423 Medical device 35 1978
 
PACESETTER AB (1)
4,869,251 Implantable heart pacemaker with a sensor for inertial and/or rotational movements of the user 21 1988
 
SIEMENS ELEMA AB (1)
5,383,911 Rate-responsive pacemaker having selectable response to arm movement and pedal impacts 12 1993

Patent Citation Ranking

Forward Cites

Patent Info (Count) # Cites Year
 
CARDIAC PACEMAKERS, INC. (42)
6,115,632 Dual chamber pulse generator with periodic PMT control 6 1998
6,912,420 Cardiac rhythm management system for hypotension 29 2001
6,907,288 Cardiac rhythm management system adjusting rate response factor for treating hypotension 27 2001
7,191,000 Cardiac rhythm management system for edema 16 2001
7,089,055 Method and apparatus for delivering pre-shock defibrillation therapy 9 2002
7,226,422 Detection of congestion from monitoring patient response to a recumbent position 22 2002
7,972,275 Method and apparatus for monitoring of diastolic hemodynamics 1 2002
7,177,681 Cardiac rhythm management system for edema 14 2003
7,369,890 Technique for discriminating between coordinated and uncoordinated cardiac rhythms 8 2003
7,248,923 Dual-use sensor for rate responsive pacing and heart sound monitoring 40 2003
7,627,373 Method and apparatus for cell and electrical therapy of living tissue 3 2003
7,425,210 Drug delivery system for implantable medical device 2 2003
8,024,040 Method and system for treatment of neurocardiogenic syncope 0 2004
7,559,901 Determining a patient's posture from mechanical vibrations of the heart 31 2004
7,387,610 Thoracic impedance detection with blood resistivity compensation 44 2004
7,981,065 Lead electrode incorporating extracellular matrix 0 2004
7,662,104 Method for correction of posture dependence on heart sounds 9 2005
7,603,170 Calibration of impedance monitoring of respiratory volumes using thoracic D.C. impedance 23 2005
7,340,296 Detection of pleural effusion using transthoracic impedance 17 2005
7,424,321 Systems and methods for multi-axis cardiac vibration measurements 14 2005
7,922,669 Ischemia detection using a heart sound sensor 8 2005
8,108,034 Systems and methods for valvular regurgitation detection 3 2005
7,848,811 Posture sensor 0 2005
7,567,836 ECG signal power vector detection of ischemia or infarction 7 2006
7,780,606 Hemodynamic stability assessment based on heart sounds 7 2006
8,000,780 Detection of myocardial ischemia from the time sequence of implanted sensor measurements 2 2006
8,343,049 Physiological response to posture change 0 2006
7,384,395 Detection of congestion from monitoring patient response to a recumbent position 5 2007
7,736,319 Ischemia detection using heart sound timing 9 2007
7,844,336 Implantable medical device configured as a pedometer 3 2007
7,422,560 Detection of congestion from monitoring patient response to a recumbent position 8 2007
7,979,115 Detection of pleural effusion using transthoracic impedance 0 2008
7,672,718 Thoracic impedance detection with blood resistivity compensation 4 2008
8,165,840 Posture sensor automatic calibration 0 2009
8,012,098 Determining a patient's posture from mechanical vibrations of the heart 0 2009
8,034,000 Ischemia detection using a heart sound sensor 2 2009
8,200,326 Calibration of impedance monitoring of respiratory volumes using thoracic D.C. impedance 2 2009
7,881,781 Thoracic impedance detection with blood resistivity compensation 1 2009
7,951,087 Method for correction of posture dependence on heart sounds 0 2009
7,938,781 Hemodynamic stability assessment based on heart sounds 2 2010
8,249,715 Implantable medical device configured as a pedometer 0 2010
8,433,419 Method and apparatus for controlling neurostimulation according to physical state 0 2011
 
MEDTRONIC, INC. (6)
6,044,297 Posture and device orientation and calibration for implantable medical devices 187 1998
7,013,178 Implantable medical device communication system 38 2002
7,139,613 Implantable medical device communication system with pulsed power biasing 4 2003
7,286,884 Implantable lead including sensor 5 2004
8,103,357 Implantable lead including sensor 0 2007
8,396,563 Clock synchronization in an implantable medical device system 0 2010
 
PACESETTER, INC. (6)
6,351,672 System and method for modulating the pacing rate based on patient activity and position 72 1999
6,937,895 Multi-site cardiac stimulation device for controlling inter-chamber stimulation delay 8 2001
7,225,023 System and method for modulating the pacing rate based on patient activity and position 2 2001
6,937,900 AC/DC multi-axis accelerometer for determining patient activity and body position 54 2002
7,171,270 Implantable cardiac device to promote intrinsic rhythm to alleviate orthostatic hypotension 0 2003
7,769,448 Multi-site cardiac stimulation device for controlling inter-chamber stimulation delay 0 2005