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A 66-year-old mand suffering from severe coronary heart disease took digoxin with suicidal intent an was treated for the ensuing complete atrioventricular block with digoxin-specific antibody fragments.
 ( adverse event: took ,  A 66-year-old mand suffering from severe coronary heart disease: Subject, 66-year-old: Subject.Age, mand: Subject.Gender, coronary heart disease: Subject.Disorder, complete atrioventricular block: Effect, digoxin: Treatment, digoxin: 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: took ,  A 66-year-old mand suffering from severe coronary heart disease: Subject, 66-year-old: Subject.Age, mand: Subject.Gender, coronary heart disease: Subject.Disorder, complete atrioventricular block: Effect, digoxin: Treatment, digoxin: Treatment.Drug) 