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At the Heart of the Matter.
We think of our hearts as the center of our beings — the source of our deepest feelings. A lost love results in a "broken heart," and disappointments give us "heavy hearts." But to doctors and scientists, the heart is an extraordinary muscle that beats about 40 million times a year to pump our life-giving blood through some 100,000 miles (160,000 km) of blood vessels in every part of our bodies. Heart disease was the nation's number one killer in the 1980s. Surgery could repair some damaged hearts, and in 1967 a South African heart specialist, Dr. Christiaan Barnard, transplanted the world's first human heart from one patient to another. Thousands of human heart transplants followed his historic achievement. But one person has to die for a human heart to be available for another person.
Mechanical Hearts.
For many years scientists and...
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This section contains 401 words (approx. 2 pages at 300 words per page) |
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