3200
Verapamil is widely used for the termination of paroxysmal supraventricular tachycardia ( PSVT ) with little proarrhythmic effect .
 proarrhythmic effect, Verapamil
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:
 proarrhythmic effect, Verapamil