Table 1

Overview of studies investigating predictors of death or clinically relevant ventricular arrhythmias in patients with repaired ToF

AuthorPatients (n)Date of repairParameters
Katz et al144141967–1977

  • Older age at repair

  • Presence of a Potts anastomosis

Gatzoulis et al41781958–1979QRS duration
Nollert et al154901958–1977

  • Date of operation (<1970)

  • Preoperative polycythaemia

  • Use of RV outflow tract patch

Berul et al161011980–1990QRS duration
Gatzoulis et al12793NA

  • QRS duration, QRS rate of change

  • Older age at repair

  • Pulmonary regurgitation (PR)

Ghai et al8125NA

  • Moderate or severe PR

  • QRS duration ≥180 ms

  • Moderate or severe LV syst. dysfunction

Khairy et al52521985–2001Inducible sustained polymorphic VT
Khairy et al17121 (selected patient population with ICD)NA

  • Prior palliative shunt

  • Inducible sustained polymorphic VT

  • QRS duration ≥180 ms

  • Ventriculotomy incision

  • Non-sustained VT

  • LVEDP ≥12 mm Hg

Diller et al9413NA

  • QRS duration

  • Right atrial area

  • RV fractional area change

  • LV longitudinal dysfunction

Valente et al1873NA

  • RV hypertrophy

  • RV and LV dysfunction

  • Atrial tachyarrhythmias

  • ICD, implantable cardioverter-defibrillator; LVEDP, LV end-diastolic pressure; ToF, Tetralogy of Fallot; VT, ventricular tachycardia.