Feasibility of multiple short, 40-s, intra-procedural ECG recordings to detect immediate changes in heart rate variability during catheter ablation for arrhythmias - Lim, PB; Malcolme-Lawes, LC; Stuber, T; Koa-Wing, M; Wright, IJ; Tillin, T; Sutton, R; Davies, DW; Peters, NS; Francis, DP; Kanagaratnam, P (Journal of Interventional Cardiac Electrophysiology, 2011)