yes this signal i got it from me..i had the electrodes placed on me but to get thi signal the Right leg was connected on ground and not in the output of the AD706..i didnt measure the frequency and amplitude of the waveform because the time i got this signal the lab that i was in was closing and i had to go..so on monday i will measure it and let you know.but it was the best signal i could get from the oscilloscope that one.what do you beleive the problem might be? is anything to do with resistor R3 and capacitor C1 as i ve drawn the circuit? or do you believe if i include and the high pass filter Fc=0.03Hz and the op-amp with G=143 i will get a proper ecg signal?