Some doctors, including Robert Higgins, chairman of cardiology at the Medical College of Virginia in Richmond, said artificial hearts are unlikely to replace donor hears.
A donor heart in a good transplant can last 15 to 30 years, he said. Its going to be hard to replace that with a machine.
The AbilCor has a 2-pound pumping unit, and electronic controls that adjust the pumping speed based on the bodys needs. It is powered by a small battery pack worn outside the body that transmits current through the skin.
36. 前两段告诉Self-contained artificial heart
A. was made of titanium and pump
B. had brought the patient to the brink of death
C. did not need to get power from outside the body
D. was invented by two surgeous from university of Louisville
37. 病人接收 the first self-contained heart
A. could not afford a donor heart
B. was said to be in a good condition the next day after the operation
C. died two months after the heart implantation
D. was reluctant to release his or her personal information
38. 第四段中the Jarvic-7 is
A. the most expensive mechanical heart
B. a mechanical heart used in the 1980s
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