WO2003037177A3 - Implantable medical device employing sonomicrometer output signals for detection and measurement of cardiac mechanical function - Google Patents

Implantable medical device employing sonomicrometer output signals for detection and measurement of cardiac mechanical function Download PDF

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Publication number
WO2003037177A3
WO2003037177A3 PCT/US2002/032025 US0232025W WO03037177A3 WO 2003037177 A3 WO2003037177 A3 WO 2003037177A3 US 0232025 W US0232025 W US 0232025W WO 03037177 A3 WO03037177 A3 WO 03037177A3
Authority
WO
WIPO (PCT)
Prior art keywords
sonomicrometer
measurement
detection
implantable medical
heart
Prior art date
Application number
PCT/US2002/032025
Other languages
French (fr)
Other versions
WO2003037177A2 (en
Inventor
Robert W Stadler
William J Combs
David Lipson
Original Assignee
Medtronic Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Medtronic Inc filed Critical Medtronic Inc
Publication of WO2003037177A2 publication Critical patent/WO2003037177A2/en
Publication of WO2003037177A3 publication Critical patent/WO2003037177A3/en

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Classifications

    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61NELECTROTHERAPY; MAGNETOTHERAPY; RADIATION THERAPY; ULTRASOUND THERAPY
    • A61N1/00Electrotherapy; Circuits therefor
    • A61N1/18Applying electric currents by contact electrodes
    • A61N1/32Applying electric currents by contact electrodes alternating or intermittent currents
    • A61N1/36Applying electric currents by contact electrodes alternating or intermittent currents for stimulation
    • A61N1/362Heart stimulators
    • A61N1/365Heart stimulators controlled by a physiological parameter, e.g. heart potential
    • A61N1/36514Heart stimulators controlled by a physiological parameter, e.g. heart potential controlled by a physiological quantity other than heart potential, e.g. blood pressure
    • A61N1/36528Heart stimulators controlled by a physiological parameter, e.g. heart potential controlled by a physiological quantity other than heart potential, e.g. blood pressure the parameter being measured by means of ultrasound
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61BDIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B8/00Diagnosis using ultrasonic, sonic or infrasonic waves
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61NELECTROTHERAPY; MAGNETOTHERAPY; RADIATION THERAPY; ULTRASOUND THERAPY
    • A61N1/00Electrotherapy; Circuits therefor
    • A61N1/18Applying electric currents by contact electrodes
    • A61N1/32Applying electric currents by contact electrodes alternating or intermittent currents
    • A61N1/36Applying electric currents by contact electrodes alternating or intermittent currents for stimulation
    • A61N1/362Heart stimulators
    • A61N1/3627Heart stimulators for treating a mechanical deficiency of the heart, e.g. congestive heart failure or cardiomyopathy
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61NELECTROTHERAPY; MAGNETOTHERAPY; RADIATION THERAPY; ULTRASOUND THERAPY
    • A61N1/00Electrotherapy; Circuits therefor
    • A61N1/18Applying electric currents by contact electrodes
    • A61N1/32Applying electric currents by contact electrodes alternating or intermittent currents
    • A61N1/36Applying electric currents by contact electrodes alternating or intermittent currents for stimulation
    • A61N1/362Heart stimulators
    • A61N1/365Heart stimulators controlled by a physiological parameter, e.g. heart potential
    • A61N1/36514Heart stimulators controlled by a physiological parameter, e.g. heart potential controlled by a physiological quantity other than heart potential, e.g. blood pressure
    • A61N1/36578Heart stimulators controlled by a physiological parameter, e.g. heart potential controlled by a physiological quantity other than heart potential, e.g. blood pressure controlled by mechanical motion of the heart wall, e.g. measured by an accelerometer or microphone

Abstract

Implantable medical devices (IMDs) for detection and measurement of cardiac mechanical and electrical function employ a system and method for determining mechanical heart function and measuring mechanical heart performance of upper and lower and left and right heart chambers without intruding into a left heart chamber through use of a dimension sensor. The dimension sensor or sensors comprise at least a first sonomicrometer piezoelectric crystal mounted to a first lead body implanted into or in relation to one heart chamber that operates as an ultrasound transmitter when a drive signal is applied to it and at least one second sonomicrometer crystal mounted to a second lead body implanted into or in relation to a second heart chamber that operates as an ultrasound receiver.
PCT/US2002/032025 2001-10-30 2002-10-07 Implantable medical device employing sonomicrometer output signals for detection and measurement of cardiac mechanical function WO2003037177A2 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US10/002,338 2001-10-30
US10/002,338 US6795732B2 (en) 2001-10-30 2001-10-30 Implantable medical device employing sonomicrometer output signals for detection and measurement of cardiac mechanical function

Publications (2)

Publication Number Publication Date
WO2003037177A2 WO2003037177A2 (en) 2003-05-08
WO2003037177A3 true WO2003037177A3 (en) 2004-03-18

Family

ID=21700317

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2002/032025 WO2003037177A2 (en) 2001-10-30 2002-10-07 Implantable medical device employing sonomicrometer output signals for detection and measurement of cardiac mechanical function

Country Status (2)

Country Link
US (2) US6795732B2 (en)
WO (1) WO2003037177A2 (en)

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US6795732B2 (en) 2004-09-21

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