6995
Zatebradine weakly depressed the ectopic ventricular rate but not the arrhythmic ratio of the ventricular arrhythmias induced by two - stage coronary ligation 24 h after the ligation in conscious dogs .
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Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: GENE 
Text: {0} 
Answer:
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