UNUSUAL DYSKINESIA COMPLICATING CARDIOPULMONARY BYPASS-SURGERY

Four infants developed dyskinesia after cardiopulmonary bypass surgery three to four days postoperatively. The dyskinesia was choreoathetoti c, and involved mainly the mouth, tongue and face. It was absent durin g sleep. Three of these infants improved over periods of several weeks , but one infant remained dyskinetic one year postoperatively. Neuro-i maging studies and EEGs were of little value in determining the cause of the dyskinesia. The factors responsible for the involuntary movemen ts and for their severity remain unexplained.