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...heart attack and whether blood is flowing freely through the coronary arteries. The test is usually performed first while the patient is exercising on a treadmill or bicycle and then while resting. Similarly, physicians can radioactively label components of the blood, like red cells, to see how efficiently the organ is pumping...
Diagnosing Arrhythmias. A large percentage of the heart disease deaths in the U.S. each year are due to arrhythmias, irreguLar heartbeats that occur when the organ's electrical impulses are disrupted. Normally, the millions of heart cells contract in specific sequence as an electric current flows from one part of the heart to another. Irregular rhythms are associated with coronary artery disease, faulty valves and heart muscle damage resulting from hypertension, heart attacks or excessive drinking. When the system shortcircuits, the heart develops abnormal rhythms, which can lead in extreme situations to fibrillation, a disorganized twitching of the heart...
Even more spectacular is an operation that researchers at the University of Utah hope to do soon: implantation of an artificial heart. The challenge is formidable, since the heart is one of nature's masterpieces. The fist-size organ beats 100,000 times a day, and over a lifetime pumps enough blood through the 60,000-mile circulatory system to fill 13 million bbl. The Utah heart, dubbed the Jarvik 7 for its designer, Robert Jarvik, is made of plastic and aluminum and powered by electricity. The implant operation will be performed by Utah Surgeon William DeVries. He will...
...eventually complained about the hand-me-downs: "You know, Father, it's a great bore, you always giving me your old mistresses to sleep with and your new boots to break in!" Retorted Dad: "You should look on it as an honor. It proves you have a thick organ and a narrow foot...
After opening the abdominal cavity with an incision of about six to eight inches, the doctors made a careful inspection to see if the twisting bullet had damaged any major blood vessels or organs. There was special concern that it might have hit the pancreas, which produces digestive enzymes that can dissolve tissue and, if they leak out, cause severe inflammation. Fortunately that vital organ escaped damage. Then the doctors ran their gloved hands along the entire 20-ft. length of the small intestine and the 5 ft. of large intestine. Typically this inch-by-inch examination is repeated...