CardioNet Inc., a San Diego-based provider of wireless mobile cardiac outpatient monitoring solutions, has filed for a $150 million IPO. It plans to trade on the Nasdaq under ticker symbol BEAT, with Citi serving as lead underwriter. CardioNet has raised around $163 million in total VC funding, including a $110 million infusion earlier this year. Shareholders include H&Q Healthcare Investors, Sanderling Ventures, Guidant Corp., Foundation Medical Partners and IngleWood Ventures. www.cardionet.com