Medtronic Drops, Results Fail to Inspire  CHICAGO (Reuters) - Shares of Medtronic Inc. &lt;A HREF="http://www.investor.reuters.com/FullQuote.aspx?ticker=MDT.N target=/stocks/quickinfo/fullquote"&gt;MDT.N&lt;/A&gt; fell  on Thursday as the company's fiscal first-quarter results,  released after the market closed on Wednesday, failed to  inspire investors.