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Fatal ventricular fibrillation after treatment with digoxin in a 27-year - old man with mitral leaflet prolapse syndrome .
 Fatal ventricular fibrillation, digoxin
Please list all entity pairs containing a certain relationship in the given options.Output format is "word1, word2; word3, word4". 
Option: adverse effect 
Text: {0} 
Answer:
 Fatal ventricular fibrillation, digoxin