Sunshine Heart Inc. CEO and President David Rosa has left after leading the medical-device maker for six years. Rosa's departure was effective Nov. 30. Board Chairman John Erb will take over as interim president and CEO. He will continue to serve as chairman. Eden Prairie-based Sunshine (Nasdaq: SSH) didn't give a reason for Rosa's departure, but he wished the company well in a prepared statement. Erb is CEO of med-tech company NuAx Inc.