1923- . Polish general, communist leader from 1981, president from 1985. He imposed martial law for the first year of his rule, suppressed the opposition, and banned trade union activity, but later released many political prisoners. In 1989, elections in favour of the free trade union Solidarity forced Jaruzelski to speed up democratic reforms, overseeing a transition to a new form of `socialist pluralist' democracy. Jaruzelski, who served with the Soviet army 1939-43, was defence minister 1968-83 and entered the Politburo 1971. At the height of the crisis of 1980-81 he assumed power as prime minister and PUWP first secretary; in 1985 he resigned as prime minister to become president, but remained the dominant political figure in Poland. His attempts to solve Poland's economic problems were unsuccessful. Jarvik 7 The first successful artificial heart intended for permanent implantation in a human being. Made from polyurethane plastic and aluminium, it is powered by compressed air. Barney Clark became the first person to receive a Jarvik 7, in Salt Lake City, Utah, USA, in Dec 1982; it kept him alive for 112 days. In 1986 a similar heart was implanted temporarily in a British patient waiting for a human heart transplant. Recently the US Food and Drug Administration withdrew approval for artificial heart transplants owing to evidence of adverse reactions. Recently the US Food and Drug Administration withdrew approval for artificial heart transplants owing to evidence of adverse reactions.