Medtronic plc , the global leader in medical technology, has voluntarily issued a global recall of unused Medtronic Valiant Navion™ thoracic stent graft system and informed physicians to immediately cease use of the device until further notice.

http://www.fda.gov/safety/recalls-market-withdrawals-safety-alerts/medtronic-announces-voluntary-recall-unused-valiant-naviontm-thoracic-stent-graft-system