Luther L. Terry (1911-1985) was Surgeon General of the United States from 1961 to 1965. It was during his tenure that the
U.S. Public Health Service study linking smoking and lung cancer was published, launching a new era of public health concern
about the adverse effects of smoking on cardiopulmonary health.
Number of Image Pages:
5 (349,366 Bytes)
ca. December 1963
Terry, Luther L.
United States. Public Health Service. Office of the Surgeon General
The enclosed information, which follows the "Outline for Invention Reports", was requested by Miss Katherine A. Parent
in a letter of September 30, 1963.
1. Title of discovery. A totally implanted, controllable cardiac pacemaker.
2. Information about inventor. The writer, Adrian Kantrowitz, M.D., and the General Electric Co. invented the pacemaker. My
residence is at 546 East 17th Street, Brooklyn 26, N.Y. My business address is the Department of Surgery, Maimonides Hospital,
4802 Tenth Avenue, Brooklyn 19, N.Y. My official title is Director of Cardiovascular Surgery. My contribution was the concept
of the pacemaker and specifications for its construction. Design of the circuit and components as well as the case and leads
of early models was carried out by the General Electric Company's Electronics Laboratory in Syracuse, N.Y. The Company's
X-ray Division in Milwaukee, Wis., modified the case and leads for the later models and now has full responsibility for the
3. Facility at which discovery was made. The idea was conceived and preliminary studies were made in the Surgical Research
Laboratory at the Edward Neimeth Institute for Medical Research, Maimonides Hospital, Brooklyn.
4. Contribution of facility to discovery. I am a full-time employee of Maimonides Hospital and spend about 50% of my time
on research supported by the National Institutes of Health. The Edward Neimeth Institute's contribution included use of
laboratory animal quarters and operating rooms, offices, machine shop and electronics laboratory.
5. Patent policies of facility. Article 7 of the By-Laws of Maimonides Hospital states the following patent policies:
"All inventions, discoveries, and improvements made by any person in the employ of the Corporation or while receiving
any compensation for his services, or while using any of the facilities of the Hospital, shall be the property of the Corporation
to be used by it for the purpose of furthering the medical sciences.
The Board of Trustees may, however, permit the discoverer or the inventor to participate in the income, if any, from the discovery
"The provisions of this Article may be waived by the Board of Trustees."
6. Other organizations contributing to discovery. The General Electric Company (Electronics Laboratory, Syracuse, and X-ray
Division, Milwaukee) is the only organization involved in this discovery.
7. Contribution of this organization. The pacemaker was designed and constructed entirely at GE's expense in men, money,
facilities and materials.
8. Patent policies of this organization. This information may be obtained directly from the General Electric Company.
9. Description of invention. An electronic pacemaker -- consisting of 5 batteries, 3 resistors, 2 transistors, and 1 capacitor
sealed in a Silastic case -- is designed for implantation in an abdominal pocket. The unit weighs 4 oz. and measures 4 x 6
x 1 1/2 cm. The components are arranged to give a 3-volt impulse to the heart every 2 milliseconds via two stainless-steel
electrodes passed from the unit and embedded in the myocardium. Also available is an optional external control in a lightweight
case connected to an induction coil which is taped on the abdomen over the implanted pacemaker. When the patient is under
unusual physical stress, the pulse rate may be raised anywhere between the internal unit's fixed rate of 65 per minute
and 120 per minute.
10. Objectives, advantages, and uses of discovery. The objective is to provide a system for regular and reliable stimulation
of the heart in cases where its own intrinsic rhythm has become so seriously disturbed that the patient's life is jeopardized
and medical therapy is unavailing. Among the advantages of this pacemaker are its total implantability obviating wires passed
through the skin with risk of infection, its small size, light weight, and low power drain. Also, the pulse rate can be readily
increased with the optional external control when desirable, e.g., during periods of stress such as infection or blood loss
when the heart rate would normally be accelerated.
11. Importance and usefulness of discovery in U.S. and foreign countries. Implantable cardiac pacemakers are becoming increasingly
useful in the treatment of complete heart block with or without Stokes-Adams seizures which at present affects numerous persons
in the U.S. and elsewhere. Widespread use of these devices may appreciably reduce the high mortality rate in this patient
12. Personal desires on applying for a patent. None.
13. I do not feel qualified to judge whether publication would be adequate to ensure the availability of this discovery to
14. Information on conception of invention and its reduction to actual practice. It becomes clear to me early in 1960 that
a device such as this would return to useful activity many persons suffering from complete heart block. Meetings were arranged
with engineers of GE's Electronics Laboratory in Syracuse who reduced the idea to a functioning device during that year.
15. Supporting evidence of item 14. Our laboratory records include voluminous notes on animal experiments as well as observations
in human patients during the development and subsequent modifications of the pacemaker.
16. Disclosures of discovery to others. Our experience with the device has been widely disseminated in the scientific community
by means of the following published papers and numerous talks at major medical meetings:
Kantrowitz, A., Cohen, R., Raillard, H., and Schmidt, J.: Experimental and clinical experience with a new implantable cardiac
pacemaker. Circulation, 24: 967, 1961.
Kantrowitz, A.: Electronic physiologic aids. Proc. 3rd IBM Medical Symposium, October 1961, New York.
Kantrowitz, A.: Life support by control of internal environment -- artificial hearts, lungs, and pacemakers. NEREM Record,
Kantrowitz, A.: The physiologic implication of implanted cardiac pacemakers in humans, Excerpta Med., Internal Congress Series
48, International Congress of Physiological Sciences, No. 761, September 1962.
Kantrowitz, A., Cohen, R., Raillard, H., Schmidt, J. and Feldman, D.S.: The Treatment of complete heart block with an implanted
controllable pacemaker. Surg. Gynec. Obstet., 115: 415, 1962.
Kantrowitz, A.: Clinical experience with an implanted controllable cardiac pacemaker. Digest 15th Ann. Conf. Engineering in
Med. and Biol., p. 64, November 1962.
Kantrowitz, A.: Experimental and clinical experience with a new implantable cardiac pacemaker. Bull. Soc. Int. Chir., 6: 691,
Feldman, D.S. and Kantrowitz, A.: Electrical characteristics of human ventricular myocardium stimulated in vivo. Clin. Res.
11: 1: 22, January 1963.
Kantrowitz, A.: Complete heart block treated with an implanted controllable cardiac pacemaker. In press (Ann. N.Y. Acad. Sci.).
Dressler, W., Jonas, S., and Kantrowitz, A.: Observation in patients with implanted cardiac pacemaker. I. Clinical experience.
Amer. Heart J., 66: 325, 1963.
Kantrowitz, A.: The Treatment of Stokes-Adams syndrome in heart block. In press (Prog. Cardiov. Dis.).
Kantrowitz, A.: Problems in the clinical use of implantable cardiac pacemakers. In press (J. Cardiov. Surg.).
17. General Electric Company engineers involved in development of the pacemaker during 1960 were: J. J. Suran, J. D. Schmidt,
and Heinz Raillard. To my knowledge, these engineers are still associated with GE. In our hospital, Richard Cohen, M.D., was
involved with me in early experiments and, during development of the pacemaker, D.S. Feldman, M.D. of the Neurology Service
made precise studies to determine myocardial needs in relation to electric stimulation.
18. The following reports on use of similar devices were in the literature at the time of the discovery:
Zoll, P.M. -- Resuscitation of the heart in ventricular standstill by external electric stimulation. New Engl. J. Med., 247,
Suran, J.J. -- Circuit properties of the PNPN transistor. Proc. Nat. Conf. Aeronaut. Electronics, May 1956.
Weirich, W.L., Gott, V.L., and Lillehei, C.W. -- The treatment of complete heart block by the combined use of a myocardial
electrode and an artificial pacemaker. Surg. Forum, 8, 1957, 360-363.
Furman, S. and Robinson, G. -- The use of an intracardiac pacemaker in the correction of total heart block. Surg. Forum, 9,
Hunter, S.W., Roth, N.A., Bernardez, D. and Noble, J.L. -- A bipolar myocardial electrode for complete heart block. Lancet,
79, 1959, 506-508.
Glenn, W.W.L., Mauro, A., Longo, E., Lavietes, P.H. and Mackay, F.J. -- Remote stimulation of the heart by radiofrequency
transmission. New Engl. J. Med., 261, 1959, 948-951.
Chardack, W.M., Gage, A.A. and Greatbatch, W. -- A transistorized, self-contained, implantable pacemaker for the long-term
correction of complete heart block. Surgery, 48, 1960, 643-654.
Please do not hesitate to request any further material needed.