Need working ECG circuit

Hello Electro Tech,
Please anybody provide me a proven and working circuit for ECG measurement. I want to see the ECG waveform using a DSO. I got lot of links from google search, but mostly theoretical or they points to another link.

Lot of INAMP datasheets are having ECG circuit but only partial. please provide me a working circuit including the filters & amp.

Thanks & regards
Udhay

A kit?:
http://www.ramseyelectronics.com/downloads/manuals/ECG1.pdf
http://medgadget.com/2006/01/diy_electrocard.html


A proven circuit?:
http://www.cisl.columbia.edu/kinget_group/student_projects/ECG%20Report/E6001%20ECG%20final%20report.htm
**broken link removed**
http://www.picotech.com/applications/ecg.html

Ken