. ▁Nav il yst ▁Medical ▁was ▁formed ▁in ▁February ▁ 2 0 0 8 ▁from ▁Boston ▁Scient ific ' s ▁Fl uid ▁Management ▁and ▁V asc ular ▁Access ▁business ▁units . ▁ ▁In ▁January ▁ 2 0 0 9 , ▁Boston ▁announced ▁it ▁would ▁ac quire ▁Lab co at ▁Limited , ▁whose ▁primary ▁development ▁was ▁that ▁of ▁a ▁development - stage ▁drug - el uting ▁st ent ▁- ▁for ▁an ▁und is closed ▁sum . ▁ ▁In ▁October ▁ 2 0 1 0 , ▁the ▁company ▁was ▁f ined ▁$ 6 0 0 , 0 0 0 ▁by ▁the ▁US ▁Department ▁of ▁Justice ▁for ▁pay ing ▁a ▁US ▁Army ▁doctor ▁to ▁use ▁their ▁devices ▁and ▁recommend ▁them ▁to ▁others . ▁In ▁the ▁same ▁month ▁Boston ▁Scient ific ▁acquired ▁Ast h mat x , ▁Inc . ▁for ▁$ 1 9 3 . 5 ▁million , ▁with ▁pay ments ▁of ▁up ▁to ▁$ 2 5 0 ▁million ▁being ▁paid ▁on ▁the ▁achiev ement ▁of ▁specified ▁re venue - based ▁criteria ▁through ▁ 2 0 1 9 . ▁ ▁In ▁January ▁ 2 0 1 1 ▁Boston ▁acquired ▁A tr ite ch , ▁Inc ., ▁for ▁$ 1 0 0 ▁million ▁plus ▁additional ▁potential ▁pay ments ▁of ▁up ▁to ▁$ 2 7 5 ▁million . ▁A tr ite ch ▁developed ▁a ▁novel ▁device ▁designed ▁to ▁close ▁the ▁left ▁at rial ▁append age ▁in ▁patients ▁with ▁at rial ▁f ibr ill ation ▁who ▁are ▁at ▁risk ▁for ▁is chem ic ▁stroke . ▁In ▁the ▁same ▁month ,