1269
After PTCA , ejection fraction increased from 54 + / - 8 % to 59 + / - 8 % ( p less than 0 . 05 ) and regional function improved significantly ( maximal standard deviation before PTCA : 2 . 8 + / - 0 . 8 ; after PTCA : 1 . 9 + / - 0 . 9 - segments below the first standard deviation before PTCA : 31 + / - 16 ; after PTCA : 19 + / - 17 ) .
 None
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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