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Three hours later the patient felt better , the frequency of PVC reduced to 4 - 5 x / minute and on the third day ECG was normal , potassium level was 3 . 34 meq / L .
 Disease: PVC; Chemical: potassium
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:
 Disease: PVC; Chemical: potassium