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A 12 year old patient with atrial flutter is presented, in whom intravenous adenosine was followed by acceleration of the heart rate to a potentially dangerous arrhythmia.
 12 year old patient with atrial flutter: Subject; 12 year old: Subject.Age; acceleration of the heart rate to a potentially dangerous arrhythmia: Effect; intravenous adenosine: Treatment; adenosine: Treatment.Drug; intravenous: Treatment.Route; atrial flutter: Treatment.Disorder
Given event type and trigger, please tell me the arguments of all the listed option. Output format is "name1: role1; name2: role2". 
Event type: adverse event 
  Option: Treatment.Freq, Subject.Population, Combination.Drug, Subject.Gender, Treatment.Duration, Subject, Effect, Treatment, Treatment.Disorder, Subject.Disorder, Treatment.Route, Subject.Race, Treatment.Time_elapsed, Treatment.Dosage, Subject.Age, Treatment.Drug 
Text: {0} 
Answer:
 12 year old patient with atrial flutter: Subject; 12 year old: Subject.Age; acceleration of the heart rate to a potentially dangerous arrhythmia: Effect; intravenous adenosine: Treatment; adenosine: Treatment.Drug; intravenous: Treatment.Route; atrial flutter: Treatment.Disorder