Ask HN: Wireless ECG advice?

I'm working on a wireless ECG system for my senior capstone design project and I'm not sure what direction to take when it comes to software. The idea is to read the ECG signal from the patient, and transmit it wirelessly in real-time to a host computer (laptop for now, Android device/iPhone eventually) for post-processing and visualization. Does anyone have experience with ECG software? Is a web app too slow for this vs. a native desktop app? Any language recommendations?