Left main coronary artery stenting after cardiac arrest in an infant with William's syndrome.

A 6-month-old female with William's syndrome and biventricular outflow obstruction had a cardiac arrest due to myocardial ischemia soon after induction of anesthesia during cardiac catheterization. The patient was supported with extra corporeal membrane oxygenator (ECMO) and successful stenting of the left main coronary artery was performed as a rescue measure. This intervention allowed successful weaning from ECMO and subsequent discharge from the hospital. Coronary intervention in infants may be successfully performed in dire situations.