One of the wearable health monitoring system that is in existence use wireless sensor platforms using
Zigbee compliant transceivers and ultra low-power micro-controllers to measure clinical parameters like
ECG , EMG, blood pressure. The u-healthcare system[1], which consists of custom 802.15.4 capable
nodes that interface with ECG and blood pressure sensors as well as with a basic cell phone device for
data display and signal feature extraction. LiveNet is a flexible distributed mobile platform aiming at
long-term health monitoring applications with real-time data processing and context classification. It uses
a Linux based PDA mobile device, a modular sensor hub for gathering, processing, and interpreting realtime
contextual data and an integrated physiological board, which incorporates a 3-D accelerometer,
electrocardiogram, electromyogram and galvanic skin conductance sensors. The recently developed
wireless body sensor network hardware, which uses the recently allocated medical implant
communication service band also exist. The system prototype consists of a pulse rate and a temperature
sensor, a central control unit and a receiver station at a medical centre. HeartToGo is a cell phone based
wearable platform, capable of continuously monitoring the user's ECG signal via a wireless ECG sensor.