CardioNet, which provides real-time outpatient management solutions for monitoring an individual's cardiac health, priced its 4.5 million share offering at $18 on Tuesday, the low end of the revised price range. The offering was larger than expected, as insiders sold 1.5 million shares instead of the 400,000 listed in the latest filing. The shares are expected to begin trading Wednesday on the NASDAQ under the ticker BEAT. Citi was the lead underwriter on the deal.