13103
We observed ventricular fibrillation in 2 patients who presented to the emergency department with pre - excited atrial fibrillation and were given 12 mg of adenosine .
 ventricular fibrillation, adenosine
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:
 ventricular fibrillation, adenosine