CardioNet wants to be as close as your next heartbeat. The company provides real-time outpatient cardiac monitoring and telemetry services for ambulatory (mobile) patients throughout the US. Aiming to improve on existing monitoring technologies by providing continuous heartbeat monitoring with nearly three weeks of data, the CardioNet System provides doctors with a complete picture of heart functions when it comes to diagnosing and monitoring arrhythmias (abnormal heart rhythms). The system relies on two-way wireless communication -- providing mobility for the patient and remote adjustment for physicians. CardioNet also sells traditional cardiac event and Holter monitors, which rely on digital or taped data.