0:45 am ET 03/22/2011 - MarketWatch Pulse News Bullet SAN FRANCISCO (MarketWatch) -- St. Jude Medical Inc. shares jumped more than 5% Tuesday on optimism about new technology the company is developing in the market for implantable cardioverter defibrillators, or ICDs. "In 2011, St. Jude will launch what we believe is the most important new product in ICDs since" 2002, Michael Weinstein, an analyst at J.P. Morgan, wrote in a note to investors on Tuesday. "The Street doesn't see it yet," he added. St. Jude should see "significant" market share gains from the new technology, the analyst added. St. Jude shares rose 5.8% to $51.28 in morning action Tuesday.