CardioMEMS Inc., which is developing an implantable device to measure and transmit pulmonary artery pressure, has raised $37.9 million in additional capital.

The funds give the Atlanta-based vendor capital to complete a clinical trial of its heart failure pressure management system, called CHAMPION, with 550 patients through 65 heart centers in the U.S. The trial started in 2007 with results expected this summer.

The device is a wireless high-frequency sensor implanted in the artery using a catheter-based procedure. The pressure is measured and displayed on a proprietary monitoring system. Following the procedure, patients perform wireless measurements of the pulmonary artery pressure from home. The data is transmitted to a secure database for physician review on a proprietary Web site.

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--Joseph Goedert


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