2878
In patients with chronic heart failure, spironolactone added to conventional treatment may lead to serious and, occasionally, fatal hyperkalaemia.
 patients with chronic heart failure: Subject; chronic heart failure: Subject.Disorder; serious and, occasionally, fatal hyperkalaemia: Effect; spironolactone: Treatment; spironolactone: Treatment.Drug
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:
 patients with chronic heart failure: Subject; chronic heart failure: Subject.Disorder; serious and, occasionally, fatal hyperkalaemia: Effect; spironolactone: Treatment; spironolactone: Treatment.Drug