47
Evidence is shown in this report that adenosine was associated with dangerous worsening of arrhythmia in patients with atrial flutter.
 ( adverse event: associated ,  patients with atrial flutter: Subject, dangerous worsening of arrhythmia: Effect, adenosine: Treatment, atrial flutter.: Treatment.Disorder, adenosine: Treatment.Drug) 
Locate the role in the text that participated in the event based on the event type and return it in the event list. 
 Option: Event type: adverse event,potential therapeutic event, Arguments type: Treatment.Disorder,Treatment.Time_elapsed,Treatment.Dosage,Subject.Race,Treatment.Drug,Treatment.Route,Subject.Disorder,Treatment.Freq,Treatment,Effect,Subject.Population,Treatment.Duration,Combination.Drug,Subject,Subject.Age,Subject.Gender. 
Text: {0} 
Answer:
 ( adverse event: associated ,  patients with atrial flutter: Subject, dangerous worsening of arrhythmia: Effect, adenosine: Treatment, atrial flutter.: Treatment.Disorder, adenosine: Treatment.Drug) 