ATTENUATIONS IN TISSUE DOPPLER-DERIVED LEFT VENTRICULAR SYSTOLIC VELOCITY PREDICT AN AMPLIFIED RISK OF LETHAL ARRHYTHMIAS IN ICD RECIPIENTS INDEPENDENTLY OF EJECTION FRACTION - Barakat, MF; Chehab, O; Hayat, S; Kelshiker, M; Turner, H; Norrington, K; Konstantinou, K; Whinnett, Z; Koa-Wing, M; Manisty, C; Wright, I; Jamil-Copley, S; et al. (ELSEVIER SCIENCE INC, 2013)