2925
The effects of aminophylline on the ventricular fibrillation threshold during normal acid - base conditions and during respiratory failure were studied in anesthetized open chest dogs .
 aminophylline, ventricular fibrillation, respiratory failure
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: Disease, Chemical 
Text: {0} 
Answer:
 aminophylline, ventricular fibrillation, respiratory failure