Xconomy -- Physio-Control, the Redmond, WA-based unit of Medtronic (NYSE: MDT) that makes heart defibrillators, said it has acquired Jolife, the Sweden-based maker of the Lucas Chest Compression System. The two companies have had a partnership since 2004, in which they have worked on the early stages of a mechanical cardio-pulmonary resuscitation device, according to a statement from Physio-Control president Brian Webster. Financial terms of the deal weren’t disclosed. Medtronic said last month it plans to spin off Physio-Control as an independent company.