ECG monitoring on android platform

Our project is to design a health monitor application on an android phone which is specifically connect to a sensor device over Bluetooth connection, whenever ECG level goes beyond threshold the android mobile should send pretyped mesg to doctors or concerned [login to view URL] how to convert digital emitted signals from bluetooth device to analog signal which should show as a ECG waveforms on android platform. [login to view URL] v can get more detailed information on this site.