3248
The systolic pressure variation ( SPV ) , which is the difference between the maximal and minimal values of the systolic blood pressure ( SBP ) after one positive - pressure breath , was studied in ventilated dogs subjected to hypotension .
 hypotension
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: Disease, Chemical 
Text: {0} 
Answer:
 hypotension