TY - JOUR TI - Normal limits of ECG measurements related to atrial activity using a modified limb lead system AU - Sivaraman, J. AU - Uma, G. AU - Venkatesan, S. AU - Umapathy, M. AU - Elumalai Dhandapani, V. JO - The Anatolian Journal of Cardiology PY - 2015 VL - 15 SP - 2 EP - 6 DO - 10.5152/akd.2014.5155 ER -