It is controversial to use uterotonic drugs in patients with uncorrected ToF who underwent CS, either uterotonic use was avoided4 or methylergonovine was used,9 because perioperative myocardial ischemia and post-operative death due to Eisenmenger’s syndrome were reported when methylergonovine was used.9 Since oxytocin was used for labor induction uneventfully in the pregnancy management of an uncorrected ToF case,3 we similarly used iv oxytocin infusion after delivery with careful titration due to its potential risk to decrease SVR. Here, OXT is linked to Eisenmenger syndrome.