http://www.rttnews.com//ArticleImages/USTopStories/2010/July/BostonScientificCorp-BSX-072010.jpgBoston Scientific Corp said on Thursday it found problems with three older models of its implantable heart defibrillators that can prevent the devices from performing life-saving functions.

The world’s second largest maker of heart devices, which has been struggling with regulatory and product issues for the last several years, confirmed a Reuters report on Wednesday that the company would issue an advisory to doctors on three models of its implantable heart defibrillators, known as ICDs.