** Shares of medical device maker Boston Scientific BSX.N rise 2.1% to $93.9 premarket
** BSX says it has agreed to buy ~74% stake not yet owned in medtech firm Bolt Medical
** Transaction consists of an upfront payment of about $443 mln for the stake and up to $221 mln upon achievement of certain regulatory milestones
** Deal, expected to be completed in the first half of 2025, will expand BSX's portfolio of cardiovascular devices
** Bolt Medical develops an advanced laser-based platform for the treatment of coronary and peripheral artery disease, which leads to buildup of plaque in the arteries
** Up to last close, BSX shares up ~58% over the past 12 months
(Reporting by Mariam Sunny in Bengaluru)
((Mariam.ESunny@thomsonreuters.com))