Word: tricuspid
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...transplant team was just beginning. In wintry Brooklyn, Dr. Kantrowitz had put his team on full alert at about the same time as Dr. Barnard was alerting his. His 19-day-old patient, the intended heart-transplant recipient, had been born blue. The child was a victim of severe tricuspid atresia-constriction, to the point of almost total closure, of the three-leafed valve that normally regulates the flow of blood from the right auricle to the right ventricle on its way to the lungs for oxygenation. There is no way to correct this condition surgically, and its victims live...
...down 40 million times a year without sticking, and Dow Coming's Chemist Silas A. Braley says confidently: "The Silastic ball cannot stick." The University of Oregon's Dr. Albert Starr has installed 18 such valves in six patients -three apiece, replacing the aortic, mitral and tricuspid valves...
...through his skull, it had landed in the left transverse sinus (a large vein). Then it had ''flowed" in the blood stream along the transverse sinus, down the main jugular vein and superior vena cava, into the right auricle (upper chamber) of the heart and through the tricuspid valve into the right ventricle. Thanks to the heart's muscular contractions, the fragment had worked halfway through the heart wall. If it had gone all the way, Kelley, who was ready to go home last week, would probably have died-just as if he had been shot...
...heart is the center of a familiar but complex machine (see diagram). Used blood, from which all the body's tissues have removed nourishing oxygen, returns through the two great veins (superior and inferior vena cava) to the right upper chamber (auricle). It empties from there through the tricuspid valve into the right ventricle. This muscular chamber contracts and pushes the blood through the pulmonary valve and pulmonary artery to the lungs to pick up fresh oxygen. Reddened blood returns to the left auricle, passes through the mitral valve into the left ventricle. This most muscular of the heart...
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