The NetGuard system is a new type of ambulatory monitoring device that's designed to be cost effective and simple to operate. The system provides immediate recognition of life-threatening cardiac events using historical heart-rate trends to indicate deterioration. The NetGuard system consists of a disposable battery and electrode set connected to a reusable transmitter worn on the patient’s chest, a proprietary wireless infrastructure, and a server to manage and display alarm data on hospital computers. The transmitter continuously analyzes the patient’s ECG and heart rate and alerts clinicians when life-saving intervention is needed.