Keith, Sir Arthur

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Sir Arthur, Scottish anatomist, 1866-1955.
Keith bundle - modified cardiac muscle fibers. Synonym(s): atrioventricular bundle
Keith and Flack node - the mass of specialized cardiac muscle fibers that normally acts as the pacemaker of the cardiac conduction system. Synonym(s): Flack node; Keith node; sinuatrial node
Keith node - Synonym(s): Keith and Flack node
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