It is estimated that 400,000 to 700,000 new cases of heart failure (HF) are diagnosed each year and the number of deaths in the United States from this chronic condition has more than doubled since 1979 - averaging 275,000 annually. HF accounts for over 1.1 million annual hospital discharges, 3.4 million physician office visits, 668,000 emergency department visits, and 293,000 outpatient visits per year. The economic impact is equally staggering: the total estimated annual cost of heart failure exceeds $40 billion. This figure is expected to reach $97 billion by 2030. While initial hospitalizations consume a vast amount of health care resources, readmissions are also a significant problem. The overall readmission rate (all cause) in the United States is 19.6%. Studies have shown the 30-day readmission rate for HF to be 24%. The important clinical implication is that patients are particularly vulnerable in the early post-discharge period (30-90 days from hospital to home) and require heightened surveillance, especially if the hospital admission has been prolonged or if the patient has had prior admissions for worsening HF. Despite advances in pharmacologic and monitoring device therapy, the inability to effectively manage and influence patient behavior and the inability of patients to identify signs and symptoms of decompensated HF are major hurdles to improving outcomes and avoiding subsequent readmissions. Less than 10% of HF patients are eligible for implantable monitoring devices due to a variety of reasons. Non-invasive cardiac telemetry units only monitor a patient's echocardiograph (ECG). HF patients present with numerous other physiologic parameters which largely go unmonitored and changes in status undetected after discharge from hospital to home. A worsening status in any one of these indicators may predict worsening condition or decompensation. This gap leaves a tremendous percentage (the majority, in fact) of the HF population at risk for repeat medical crisis and re-hospitalizations.