CardioMems, a developer of wireless medical pressure sensors previously backed by US-based healthcare company Medtronic, has raised $37.9m in its seventh round of funding.
The round included nearly $25m of converted promissory notes and accrued interest, according to a regulatory filing. CardioMems has previously raised $107m from Medtronic and venture capital firms Arcapita Ventures, Boston Millennia Partners, Easton Capital Partners, Foundation Medical Partners, Arboretum Ventures, Deeerfield Capital Management, Vision Capital Advisors, Aperture Venture Partners and Rockport Venture Securities.