John Alexander Hopps | |
---|---|
Born | Winnipeg, Manitoba, Canada | May 21, 1919
Died | November 24, 1998 79) | (aged
Alma mater | University of Manitoba (B.Sc.Eng.) |
Occupation | medical researcher |
Known for | pioneering cardiac pacemaker |
Awards | Order of Canada |
John Alexander Hopps, OC (May 21, 1919 – November 24, 1998) was a co-developer of both the first artificial pacemaker and the first combined pacemaker-defibrillator, and was the founder of the Canadian Medical and Biological Engineering Society (CMBES). He has been called the "Father of biomedical engineering in Canada." [1] [2] [3]
He was also the President and Secretary-General of the International Federation for Medical and Biological Engineering from the 1970s to the mid-1980s. [1] He is a member of the Canadian Science and Engineering Hall of Fame. [4]
Born in Winnipeg, Manitoba, [5] he received a B.Sc.Engineering degree in electrical engineering from the University of Manitoba in 1941. He joined the National Research Council of Canada (NRC) in 1942.
In the early 1940s, Hopps was very focused on researching how to pasteurize beer using various waves like radio waves or microwaves. [6] Beginning in 1949, he worked with Doctors Wilfred Bigelow and John Callaghan at the Banting Institute in the University of Toronto, developing the world's first external artificial pacemaker in 1951. (The first internal pacemaker was implanted in a human body by a Swedish team in 1958.) Hopps initially resented his work at the institute, calling it "an annoying interruption." [7] During this work, Hopps discovered that the heart would contract when subjected to electrical impulses. [8]
Hopps was an advisor to the Sri Lanka health department's Electromedical Division through the Canadian government's Colombo Plan in 1957-58 before returning to the NRC and becoming head of its Medical Engineering Section in 1973. [9]
In 1965, Hopps founded the Canadian Medical and Biological Engineering Society (CMBES) and became its first President. [10] In 1971, he was appointed president of the International Federation for Medical and Biological Engineering, for which he later served as the secretary general from 1976 to 1985. [6] In 1976, he was awarded the honour of Fellow of the CMBES. [11] He was also the President of the Ontario Heart Foundation's Ottawa Chapter.
He retired in 1978. In 1985, his autobiography, Passing Pulses, the Pacemaker and Medical Engineering: A Canadian Story, was published. [12] The same year, he also won the A.G.L. McNaughton Award for engineering contributions made as a Canadian. [13]
In 1986, he was made an Officer of the Order of Canada. [1]
An artificial cardiac pacemaker, commonly referred to as simply a pacemaker, is an implanted medical device that generates electrical pulses delivered by electrodes to one or more of the chambers of the heart. Each pulse causes the targeted chamber(s) to contract and pump blood, thus regulating the function of the electrical conduction system of the heart.
Wilfred Gordon "Bill" Bigelow was a Canadian heart surgeon known for his role in developing the artificial pacemaker and the use of hypothermia in open heart surgery.
The sinoatrial node is an oval shaped region of special cardiac muscle in the upper back wall of the right atrium made up of cells known as pacemaker cells. The sinus node is approximately 15 mm long, 3 mm wide, and 1 mm thick, located directly below and to the side of the superior vena cava.
Samarjit singh is king John G. Webster was an American electrical engineer and a founding pioneer in the field of biomedical engineering. In 2008, Professor Webster was awarded the University of Wisconsin, College of Engineering, Polygon Engineering Council Outstanding Instructor Award. In 2019, the Institute of Electrical and Electronics Engineers awarded him its James H. Mulligan Jr. Educational Medal for his career contributions. Professor Webster died on March 29, 2023.
Anthony J. Adducci was a pioneer of the medical device industry in Minnesota. He is best known for co-founding Cardiac Pacemakers, Inc., the company that manufactured the world's first lithium battery-powered artificial pacemaker. The lithium-iodide cell revolutionized the medical industry and is now the standard cell for pacemakers.
Leslie Alexander Geddes was an electrical engineer and physiologist. He conducted research in electromyography, cardiac output, cardiac pacing, ventricular defibrillation, and blood pressure. He discovered and demonstrated precisely the optimal sites on the chest for defibrillation or pacing.
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Pacemaker syndrome is a condition that represents the clinical consequences of suboptimal atrioventricular (AV) synchrony or AV dyssynchrony, regardless of the pacing mode, after pacemaker implantation. It is an iatrogenic disease—an adverse effect resulting from medical treatment—that is often underdiagnosed. In general, the symptoms of the syndrome are a combination of decreased cardiac output, loss of atrial contribution to ventricular filling, loss of total peripheral resistance response, and nonphysiologic pressure waves.
Pacemaker failure is the inability of an implanted artificial pacemaker to perform its intended function of regulating the beating of the heart. A pacemaker uses electrical impulses delivered by electrodes in order to contract the heart muscles. Failure of a pacemaker is defined by the requirement of repeat surgical pacemaker-related procedures after the initial implantation. Most implanted pacemakers are dual chambered and have two leads, causing the implantation time to take longer because of this more complicated pacemaker system. These factors can contribute to an increased rate of complications which can lead to pacemaker failure.
James McEwen is a Canadian biomedical engineer and the inventor of the microprocessor-controlled automatic tourniquet system, which is now standard for 15,000-20,000 procedures daily in operating rooms worldwide. Their widespread adoption and use has significantly improved surgical safety, quality and economy. McEwen is President of Western Clinical Engineering Ltd., a biomedical engineering research and development company and he is a director of Delfi Medical Innovations Inc., a company he founded to commercialize some results of that research and development. He is also an adjunct professor in the School of Biomedical Engineering, in the Department of Orthopaedics and in the Department of Electrical and Computer Engineering at the University of British Columbia.
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Jorge Reynolds Pombo is an electrical and bio- engineer born in Bogotá, Colombia on June 22, 1936. He is known for contributing to the invention of the pacemaker, being one of the first doctors in Latin America to make a significant contribution to the medical field. In 1957, Earl Bakken of Minneapolis, Minnesota, produced the first wearable external pacemaker for a pediatric patient of C. Walton Lillehei. The Swede Rune Elmqvist (1906-1996) developed the first internally implanted pacemaker in 1958. During this time, Reynolds Pombo had designed and built an external pacemaker powered by a 12-volt battery. It was connected to a patient in December 1958.
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The Canadian Medical and Biological Engineering Society (CMBES) is a technical society representing the biomedical engineering community in Canada. CMBES is supported by its membership which consists of biomedical engineers, biomedical engineering technologists and students. CMBES also hosts an annual conference and regular webinars. It produces a number of publications including the Clinical Engineering Standards of Practice and a Newsletter. The Society's aims are twofold: scientific and educational: directed toward the advancement of the theory and practice of medical device technology; and professional: directed toward the advancement of all individuals in Canada who are engaged in interdisciplinary work involving engineering, the life sciences and medicine.
Mohamed (Mo) El-Aref El-Hawary, was an Egyptian-born Canadian scientist of electric power system studies and the involvement of traditional/modern optimization algorithms, fuzzy systems, and artificial neural networks in their applications. El-Hawary was a mathematician, electrical engineer, computational intelligence researcher and professor of electrical and computer engineering at Dalhousie University.
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