3023
Although transient increases in ectopy after bretylium therapy have been described , presumably due to catecholamine release , the occurrence of life - threatening ventricular arrhythmia leading to cardiac arrest has not previously been emphasized .
 cardiac arrest, bretylium; ventricular arrhythmia, bretylium
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:
 cardiac arrest, bretylium; ventricular arrhythmia, bretylium