65
Table 32. Established Risk Factors for Sustained
Monomorphic Ventricular Tachycardia/Sudden
Cardiac Death in Repaired Tetralogy of Fallot
QRS duration ≥180 ms
Moderate or greater LV or RV dysfunction
Prior ventriculotomy
Late age at definitive repair
Symptomatic non-sustained ventricular tachycardia/arrhythmic symptoms
QRS fragmentation
Inducible sustained ventricular arrhythmia at invasive electrophysiolog y study
LV indicates le ventricular; and RV, right ventricular.
