William deVries is an American cardiothoracic surgeon, who performed the first successful permanent artificial heart implant for [Barney Clark]
?, by using an artificial device designed by [Robert Jarvik]
?. After about 90 people received the Jarvik device, artificial hearts were banned in America, since the current technological status appeared to be insufficient for producing an artificial heart and these machines were decided to be used only temporarily for patients waiting for natural hearts.
I am confused. The article says the devices have been banned in the U.S., and then it it says that the devices could be used temporarily (in the U.S., right?), which implies that they weren't banned. --LMS
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