IT1118131B - IMPROVEMENT IN MULTI-MODE CARDIAC PACEMAKERS ADAPTABLE IMPLANTABLE - Google Patents

IMPROVEMENT IN MULTI-MODE CARDIAC PACEMAKERS ADAPTABLE IMPLANTABLE

Info

Publication number
IT1118131B
IT1118131B IT49768/79A IT4976879A IT1118131B IT 1118131 B IT1118131 B IT 1118131B IT 49768/79 A IT49768/79 A IT 49768/79A IT 4976879 A IT4976879 A IT 4976879A IT 1118131 B IT1118131 B IT 1118131B
Authority
IT
Italy
Prior art keywords
output
counter
vco
controlled
leads
Prior art date
Application number
IT49768/79A
Other languages
Italian (it)
Other versions
IT7949768A0 (en
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 IT7949768A0 publication Critical patent/IT7949768A0/en
Application granted granted Critical
Publication of IT1118131B publication Critical patent/IT1118131B/en

Links

Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61N—ELECTROTHERAPY; MAGNETOTHERAPY; RADIATION THERAPY; ULTRASOUND THERAPY
    • A61N1/00—Electrotherapy; Circuits therefor
    • A61N1/18—Applying electric currents by contact electrodes
    • A61N1/32—Applying electric currents by contact electrodes alternating or intermittent currents
    • A61N1/36—Applying electric currents by contact electrodes alternating or intermittent currents for stimulation
    • A61N1/372—Arrangements in connection with the implantation of stimulators
    • A61N1/37211—Means for communicating with stimulators
    • A61N1/37252—Details of algorithms or data aspects of communication system, e.g. handshaking, transmitting specific data or segmenting data
    • A61N1/37264—Changing the program; Upgrading firmware
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61N—ELECTROTHERAPY; MAGNETOTHERAPY; RADIATION THERAPY; ULTRASOUND THERAPY
    • A61N1/00—Electrotherapy; Circuits therefor
    • A61N1/18—Applying electric currents by contact electrodes
    • A61N1/32—Applying electric currents by contact electrodes alternating or intermittent currents
    • A61N1/36—Applying electric currents by contact electrodes alternating or intermittent currents for stimulation
    • A61N1/362—Heart stimulators
    • A61N1/365—Heart stimulators controlled by a physiological parameter, e.g. heart potential
    • A61N1/368—Heart stimulators controlled by a physiological parameter, e.g. heart potential comprising more than one electrode co-operating with different heart regions
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61N—ELECTROTHERAPY; MAGNETOTHERAPY; RADIATION THERAPY; ULTRASOUND THERAPY
    • A61N1/00—Electrotherapy; Circuits therefor
    • A61N1/18—Applying electric currents by contact electrodes
    • A61N1/32—Applying electric currents by contact electrodes alternating or intermittent currents
    • A61N1/36—Applying electric currents by contact electrodes alternating or intermittent currents for stimulation
    • A61N1/362—Heart stimulators
    • A61N1/37—Monitoring; Protecting
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61N—ELECTROTHERAPY; MAGNETOTHERAPY; RADIATION THERAPY; ULTRASOUND THERAPY
    • A61N1/00—Electrotherapy; Circuits therefor
    • A61N1/18—Applying electric currents by contact electrodes
    • A61N1/32—Applying electric currents by contact electrodes alternating or intermittent currents
    • A61N1/36—Applying electric currents by contact electrodes alternating or intermittent currents for stimulation
    • A61N1/372—Arrangements in connection with the implantation of stimulators
    • A61N1/37211—Means for communicating with stimulators

Abstract

A multi-mode pacemaker includes a microprocessor 100 and a memory 102 programmable with a variety of processes for stimulating a heart and/or a sensing and transmitting to an external device conditions of the heart or pacemaker. The microprocessor controls a multiplexer 106 to input via a scaling amplifier and a/d converter 108 signals from atrial and ventricular leads 17, 19, the power source 126, a reed switch 23 operable by an external magnet, or redundant leads on lines 138d,e. The output comprises latch drivers 134 a-d with respective output select switches 130 a-d selectively operable to supply stimulation pulses to the leads or allow sensing. External apparatus 104 may transmit coded information to change the stored program or operation of the reed switch may select a different program starting address. Pulse width, rate and amplitude may be controlled in response to sensed heart activity or power source level and different pacing modes (demand, asynchronous, etc.) or multi-site pacing to disrupt arrhythmias may be selected automatically or externally. In an aid converter 308 (Figure 8), counter 400 counts up the output of VCO 402 controlled by unknown signal V(X) and then counts down to zero the output of VCO 402 then controlled by reference EREF and during such countdown a counter 412 counts clock pulses so that when counter 400 reaches zero the output of counter 412 depends on V(X) but not on the scale factor of VCO 402. <IMAGE>
IT49768/79A 1978-07-20 1979-07-16 IMPROVEMENT IN MULTI-MODE CARDIAC PACEMAKERS ADAPTABLE IMPLANTABLE IT1118131B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US92630378A 1978-07-20 1978-07-20

Publications (2)

Publication Number Publication Date
IT7949768A0 IT7949768A0 (en) 1979-07-16
IT1118131B true IT1118131B (en) 1986-02-24

Family

ID=25453021

Family Applications (1)

Application Number Title Priority Date Filing Date
IT49768/79A IT1118131B (en) 1978-07-20 1979-07-16 IMPROVEMENT IN MULTI-MODE CARDIAC PACEMAKERS ADAPTABLE IMPLANTABLE

Country Status (8)

Country Link
JP (1) JPS5521990A (en)
AU (2) AU536053B2 (en)
DE (2) DE2929498A1 (en)
FR (2) FR2431296A1 (en)
GB (2) GB2026870B (en)
IT (1) IT1118131B (en)
NL (1) NL7905649A (en)
SE (1) SE445176B (en)

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Also Published As

Publication number Publication date
JPS6241032B2 (en) 1987-09-01
DE2929498A1 (en) 1980-01-31
AU536053B2 (en) 1984-04-19
GB2079610A (en) 1982-01-27
GB2079610B (en) 1983-04-07
GB2026870B (en) 1982-12-15
FR2445659A1 (en) 1980-07-25
IT7949768A0 (en) 1979-07-16
SE7906205L (en) 1980-01-21
AU3271384A (en) 1984-12-20
GB2026870A (en) 1980-02-13
AU4898979A (en) 1980-01-24
FR2431296B1 (en) 1984-01-06
SE445176B (en) 1986-06-09
DE2929498C2 (en) 1991-07-11
FR2445659B1 (en) 1985-11-29
FR2431296A1 (en) 1980-02-15
NL7905649A (en) 1980-01-22
DE2954642C2 (en) 1991-11-07
JPS5521990A (en) 1980-02-16
AU584310B2 (en) 1989-05-25

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