P1614T wave alternans in patients with an implanted cardioverter defibrillator: results of spectral and modified moving average method differ considerably. (20th June 2017) - Flevari, P.; Katsimardos, A.; Katsaras, D.; Dunnink, A.; Leftheriotis, D.; Roever, C.; Tuinenburg, A.; Vos, M.; Zabel, M.