%0 Journal Article %T Normal limits of ECG measurements related to atrial activity using a modified limb lead system %A Sivaraman, J. %A Uma, G. %A Venkatesan, S. %A Umapathy, M. %A Elumalai Dhandapani, V. %J The Anatolian Journal of Cardiology %D 2015 %V 15 %P 2-6 %R 10.5152/akd.2014.5155