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Gerrard M Carlson

age ~69

from Houston, TX

Also known as:
  • Gerrard Carlson
  • Jerry Carlson
  • Gerard Carlson
  • Carlson Gerrard

Gerrard Carlson Phones & Addresses

  • Houston, TX
  • Minneapolis, MN
  • Champlin, MN
  • Maple Grove, MN

Us Patents

  • Extraction Of Hemodynamic Pulse Pressure From Fluid And Myocardial Accelerations

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  • US Patent:
    6366811, Apr 2, 2002
  • Filed:
    Dec 30, 1999
  • Appl. No.:
    09/475860
  • Inventors:
    Gerrard M. Carlson - Champlin MN
  • Assignee:
    Cardiac Pacemakers, Inc. - St. Paul MN
  • International Classification:
    A61N 1365
  • US Classification:
    607 27, 607 17, 607 23, 600485, 600526, 600513
  • Abstract:
    A cardiac stimulating apparatus and method is described that non-intrusively determines an amount indicative of hemodynamic pulse pressure from an accelerometer signal. The amount indicative of pulse pressure is determined over several cardiac cycles and is used to optimize cardiac performance by evaluating the amount indicative of pulse pressure over varying timing intervals. The timing intervals are measured between at least one of intrinsic and paced stimulations of pre-selected chambers of the heart and a maximum pulse pressure indicates the optimum timing interval under manipulation. The cardiac stimulating apparatus and method may be used in any of several pacing modes including A-V pacing, V-V pacing, or A-A pacing.
  • Single Pass Lead System

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  • US Patent:
    6505082, Jan 7, 2003
  • Filed:
    Aug 21, 2000
  • Appl. No.:
    09/643125
  • Inventors:
    Avram Scheiner - Vadnais Heights MN
    William Hsu - Circle Pines MN
    David M. Flynn - Lino Lakes MN
    Qingsheng Zhu - Little Canada MN
    John E. Heil - White Bear Lake MN
    Curtis C. Lindstrom - Roseville MN
    Yayun Lin - St. Paul MN
    Peter T. Kelley - Buffalo MN
    Jay A. Warren - North Oaks MN
    Gerrard M. Carlson - Champlin MN
    Carol Werlein - Ham Lake MN
    Aaron W. Janke - St. Paul MN
    Mary Lee Cole - St. Paul MN
    Jeffrey T. Bartig - Maplewood MN
    Gary W Goebel - Vadnais Heights MN
    Douglas A Heitkamp - White Bear Lake MN
    Randall M. Peterfeso - St. Paul MN
  • Assignee:
    Cardiac Pacemakers, Inc. - St. Paul MN
  • International Classification:
    A61N 105
  • US Classification:
    607123
  • Abstract:
    A single-pass endocardial lead electrode adapted for implantation in, on or about the heart and for connection to a system for monitoring or stimulating cardiac activity includes a lead body which is adapted for implantation within a single chamber of the heart, or multiple chambers of the heart. The lead includes a first distal end electrode which has a first electrical conducting surface. The lead body also has a second electrode which has a second electrical conducting surface. The first and second electrodes are either passively or actively attached to the wall of the heart. The lead body also includes a curved portion which facilitates the positioning of the second electrode. The main lead body alternatively includes a recess into which an atrial lead body and an active fixation element attached to one end can travel from a recessed position to a position for fixation to the wall of the heart. The active fixation element can also be moved by turning the terminal pin. The lead body can also include multiple legs, each leg carrying an electrode.
  • Heart Rate Variability As An Indicator Of Exercise Capacity

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  • US Patent:
    6529772, Mar 4, 2003
  • Filed:
    Jun 25, 2001
  • Appl. No.:
    09/888726
  • Inventors:
    Gerrard M. Carlson - Champlin MN
    Veerichetty A. Kadhiresan - Lino Lakes MN
    Julio C. Spinelli - Shoreview MN
  • Assignee:
    Cardiac Pacemakers, Inc. - St. Paul MN
  • International Classification:
    A61B 504
  • US Classification:
    600510, 600521, 607 25
  • Abstract:
    Based upon patient studies indices a high degree of correlation was found between HRV and VO , i. e. , the patients exercise capacity. Based on this finding, a pacing therapy optimization protocol for treating patients with CHF has been devised. The protocol involves first pacing the patients heart with a pacemaker programmed to operate in a first mode for a predetermined time period and then collecting electrogram data from which a HRV index is derived. The mode is then changed and the steps repeated until all possible modes have been utilized. At that time, a determination is made as to which of the modes is associated with the largest HRV index and the pacemaker is then programmed to function in that mode. Alternatively, the method of the present invention can be applied to changes in drug therapy instead of or in combination with pacing therapy. By the plotting the HRV index computed in the manner described, the efficacy of a change in therapy on patient exercise capacity can be assessed.
  • Accelerometer-Based Heart Sound Detection For Autocapture

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  • US Patent:
    6650940, Nov 18, 2003
  • Filed:
    Feb 2, 2000
  • Appl. No.:
    09/496832
  • Inventors:
    Qingsheng Zhu - Little Canada MN
    Julio C. Spinelli - Shoreview MN
    Gerrard M. Carlson - Champlin MN
  • Assignee:
    Cardiac Pacemakers, Inc. - St. Paul MN
  • International Classification:
    A61N 1365
  • US Classification:
    607 28, 600528
  • Abstract:
    An implantable cardiac rhythm management device capable of automatically detecting intrinsic and evoked response of a patients heart. The device operates in an automatic capture verification mode, wherein a global accelerometer signal is utilized to identify heart sounds (S and S ) of the patients heart. The presence or absence of one or more of the heart sounds S and S in the accelerometer signal indicates whether a stimulation pulse evokes a response by the patients heart. The device may automatically adjust the stimulation output in accordance with a step down stimulation protocol, wherein the presence of a predetermined heart sound indicates capture. Also, the device may suspend the automatic capture verification sequence if the patients physical activity level exceeds a predetermined threshold.
  • Cardiac Rhythm Management System Selecting A-V Delay Based On Interval Between Atrial Depolarization And Mitral Valve Closure

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  • US Patent:
    6665564, Dec 16, 2003
  • Filed:
    May 21, 2001
  • Appl. No.:
    09/862763
  • Inventors:
    William C. Lincoln - Coon Rapids MN
    Gerrard M. Carlson - Champlin MN
  • Assignee:
    Cardiac Pacemakers, Inc. - St. Paul MN
  • International Classification:
    A61N 1365
  • US Classification:
    607 17, 607 9
  • Abstract:
    A cardiac rhythm management system selects an atrioventricular (A-V) delay based on a time-interval between an atrial depolarization and mitral valve closure (MVC). For several different A-V delays, the system measures time intervals between atrial depolarizations (i. e. , sensed or paced P-waves) and accelerometer-detected MVCs. Based on this information, the system selects a particular A-V delay for improving cardiac output during subsequent delivery of cardiac rhythm management therapy.
  • Cardiac Rhythm Management System Using Time-Domain Heart Rate Variability Indicia

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  • US Patent:
    6678547, Jan 13, 2004
  • Filed:
    Mar 8, 2001
  • Appl. No.:
    09/802316
  • Inventors:
    Gerrard M. Carlson - Champlin MN
    Julio C. Spinelli - Shoreview MN
  • Assignee:
    Cardiac Pacemakers, Inc. - St. Paul MN
  • International Classification:
    A61B 50464
  • US Classification:
    600515, 607 14
  • Abstract:
    A cardiac rhythm management system that provides an indication of patient well-being based on the autonomic balance between the sympathetic and parasympathetic/vagal components of the autonomic nervous system, using time-domain processing of frequency components of a heart rate interval signal.
  • Lv Ectopic Density Trending

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  • US Patent:
    6718197, Apr 6, 2004
  • Filed:
    Nov 2, 2000
  • Appl. No.:
    09/704844
  • Inventors:
    Gerrard M. Carlson - Champlin MN
    Julio C. Spinelli - Shoreview MN
  • Assignee:
    Cardiac Pacemakers, Inc. - St. Paul MN
  • International Classification:
    A61B 504
  • US Classification:
    600515, 607 32
  • Abstract:
    Ectopic beat activity detection of the human heart is monitored by time interval measurements of depolarizations in the heart. The intervals between beats are categorized as being long beats, short beats or normal beats. Then the sequence of categories of beats is analyzed to determine the types of ectopic beats occurring and to count such occurrences and display such information to a health care provider to help monitor, diagnose and treat patients. For patients with pacemakers installed the information can be used to adjust pacemaker settings. The information may also be used to alert the health care providers to dangerous patterns indicating serious conditions which need immediate treatment.
  • Atrial Interval Based Heart Rate Variability Diagnostic For Cardiac Rhythm Management System

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  • US Patent:
    6748272, Jun 8, 2004
  • Filed:
    May 18, 2001
  • Appl. No.:
    09/861017
  • Inventors:
    Gerrard M. Carlson - Champlin MN
    Kenneth L. Baker - Shoreview MN
    Jeffrey E. Stahmann - Ramsey MN
  • Assignee:
    Cardiac Pacemakers, Inc. - St. Paul MN
  • International Classification:
    A61N 1365
  • US Classification:
    607 14, 607 9, 600508, 600515
  • Abstract:
    A cardiac rhythm management system acquires atrial heart rate variability data. The system provides a graphic or other indication of patient well-being based on the atrial heart rate variability data. Such atrial heart rate variability information provides an indication of the autonomic balance between the sympathetic and parasympathetic/vagal components of the autonomic nervous system. One example of the system also provides time-domain processing of frequency components of the atrial heart rate interval signal to obtain the indication of patient well-being.

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