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The sinoatrial node (SA node) is the primary pacemaker of the heart. It is a region of cardiac muscle on the wall of the upper right atrium near to the superior vena cava entrance. The cells that make up the SA node are specialized cardiomyocytes known as pacemaker cells that can spontaneously generate cardiac action potentials.
The primary purpose of a pacemaker is to maintain an even heart rate, either because the heart's natural cardiac pacemaker provides an inadequate or irregular heartbeat, or because there is a block in the heart's electrical conduction system. Modern pacemakers are externally programmable and allow a cardiologist to select the optimal pacing ...
This program accepts applications for university lecturers that wish to put their courses online, and gives grants of between $10,000 – 15,000 CAD per course that is put online, and made available free of charge to the general public (ibid.). The most prestigious award is for the "national level CQOCW", then there is "provincial level" and ...
Development of the artificial cardiac pacemaker and cardiac defibrillator Paul Maurice Zoll (July 15, 1911 – January 5, 1999) [ 1 ] was a Jewish [ 2 ] American cardiologist and one of the pioneers in the development of the artificial cardiac pacemaker and cardiac defibrillator .
For example, in edX's first MOOC—a circuits and electronics course—students built virtual circuits in an online lab. [25] edX offers certificates of successful completion and some courses are credit-eligible. Whether or not a college or university offers credit for an online course is within the sole discretion of the school.
Albert Salisbury Hyman (1893 - 1972), a Harvard-trained New York cardiologist, together with his brother Charles, constructed in 1930-1932 an electromechanical device which was one of the earliest artificial pacemakers. The device was reportedly tested on experiment animals and at least one human patient.
Cardiology (from Ancient Greek καρδίᾱ (kardiā) 'heart' and -λογία () 'study') is the study of the heart. Cardiology is a branch of medicine that deals with disorders of the heart and the cardiovascular system.
Harvard Medical School (HMS) is the medical school of Harvard University and is located in the Longwood Medical Area in Boston, Massachusetts.Founded in 1782, HMS is one of the oldest medical schools in the United States, [2] and provides patient care, medical education, and research training through its 15 clinical affiliates and research institutes, including Massachusetts General Hospital ...