Boston Scientific swallows Guidant:
Massachusetts-based Boston Scientific Corp. finally sealed its purchase of Indianapolis medical device maker Guidant Corp. in April. But it was still paying a price for the $27-billion deal as 2006 wound to a close. Boston Scientific shares have tumbled since the deal closed, partly because of concern that its signature product, drugcoated stents that prop open obstructed heart vessels, can sometimes cause fatal blood clots. But many of the company’s difficulties relate to product-liability problems at Guidant, one of the…