Not surprisingly, the inevitable investigations and litigation regarding the Sprint Fidelis lead situation has started:(WSJ) In early signs of the pressure likely to come for Medtronic and the FDA, (Senator) Mr. (Chuck) Grassley, a Republican, last night sent letters to the company and the agency asking for more information about the leads. Separately, consumer group Public Citizen argued in a letter that the company and agency should have taken action sooner. In addition, a group of...