Medtronic Wins FDA Approval on Insync Sentury ICD  CHICAGO (Reuters) - Medtronic Inc. &lt;A HREF="http://www.reuters.co.uk/financeQuoteLookup.jhtml?ticker=MDT.N qtype=sym infotype=info qcat=news"&gt;MDT.N&lt;/A&gt; on Monday said  U.S. regulators approved its Insync Sentry implantable  defibrillator (ICD) months earlier than it expected.