pehub.com -- CardioMEMS Inc., an Atlanta-based developer of wireless medical pressure sensors, has raised $22.1 million in sixth-round funding from existing shareholders. The company previously had raised around $85 million, from firms like Arcapita Ventures, Boston Millennia Partners, Medtronic, Easton Capital Partners, Foundation Medical Partners, Arboretum Ventures, Deerfield Capital Management, Vision Capital Advisors, Aperture Venture Partners and Rockport Venture Securities.