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 .
 adverse effect: cardiac arrest, bretylium; adverse effect: ventricular arrhythmia, bretylium
Given options, please tell me the relationships of all the listed entity pairs.Output format is "relation1: word1, word2; relation2: word3, word4". 
Option: adverse effect 
Text: {0} 
 Entity Pairs:  cardiac arrest, bretylium; ventricular arrhythmia, bretylium 
Answer:
 adverse effect: cardiac arrest, bretylium; adverse effect: ventricular arrhythmia, bretylium