Assessment of Microvolt T Wave Alternans in XXXX with Repaired Tetralogy of Fallot during 24-Hour Holter Electrocardiography.

@entity1 @entity215 @entity997 @entity1540 @entity943
BACKGROUND: We aimed to examine microvolt T wave alternans (MTWA) in 24-hour Holter electrocardiography (ECG) of @entity1 with repaired @entity215 ( @entity215 ) to assess associations of MTWA with @entity943 , ECG parameters, and echocardiographic findings. METHODS: Holter ECG records and archive files of 56 repaired @entity215 @entity1 (62.5% male) who were analyzed retrospectively. Subjects' ECG parameters and MTWA values were compared with age-sex-matched control group. T wave changes were analyzed by time-domain-modified moving average method from the three channels of 24-hour Holter ECG. RESULTS: Mean age was 123.4    48.3 months. Median MTWA value was 55.5  V in the control group, whereas 95.5  V in @entity1 group (P < 0.001). A significant weak positive correlation was found between the presence of @entity1540 and @entity997 . There was no correlation between ECG parameters, echocardiographic findings, and MTWA. CONCLUSIONS: MTWA was increased in @entity1 with repaired @entity215 as reported before. To our knowledge, this is the first study analyzing MTWA with 24-hour Holter ECG in repaired @entity215 @entity1 .
