1647
Digitalis arrhythmia , which is suppressed by Na channel blockers , was induced by intermittent intravenous ( i . v . ) injection of ouabain in pentobarbital - anesthetized dogs .
 Chemical: Digitalis; Disease: arrhythmia; Chemical: Na; Chemical: ouabain; Chemical: pentobarbital
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Disease, Chemical 
Text: {0} 
Answer:
 Chemical: Digitalis; Disease: arrhythmia; Chemical: Na; Chemical: ouabain; Chemical: pentobarbital