 Upon arrival at Children's Hospital, the patient was found to be in a narrow complex tachycardia with the rate in excess of 258 beats per minute with a successful cardioversion to sinus rhythm with adenosine. 
Upon arrival at Children 's Hospital , the patient was found to be in a narrow complex tachycardia with the rate in excess of 258 beats per minute with a successful cardioversion to sinus rhythm with adenosine .