Guidant Resolves Champion Stent Issues  CHICAGO (Reuters) - Cardiovascular device maker Guidant  Corp. &lt;A HREF="http://www.investor.reuters.com/FullQuote.aspx?ticker=GDT.N target=/stocks/quickinfo/fullquote"&gt;GDT.N&lt;/A&gt; said on Thursday it has resolved problems with  its Champion drug-coated stent and plans to launch the heart  device in Europe in mid-2005.