Ventricular arrhythmias by 24-hour ECG Holter Time Arrhythmias preop (1) (n=119) 7 days postop (2) (n=117) 3 months postop (3) (n=116) 6 months postop (4) (n=116) 13 ventricular extrasystoles (n,%) Yes 78 (65, 50) 98 (83, 80) 80 (69, 60) 76 (65, 50) No 41 (34, 50) 19 (16, 20) 35 (30, 40) 40 (34, 50) p p (1, 2) < 0, 05 p (1, 3) > 0, 05 p (1, 4) > 0, 05 ventricular tachycardia (n,%) Yes 3 (2, 50) 8 (6, 80) 4 (3, 50) 1 (0, 90) No 116 (97, 50) 109 (93, 20) 112 (96, 50) 115 (99, 10) p p (1, 2) > 0, 05 p (1, 3) > 0, 05 p (1, 4) > 0, 05 Table 3.15.