167995
It is characterized by cardiac pain that occurs in the morning and that can not be stopped even with normal treatments of nitroglycerin , along with other occurrences of heart rhythm disturbances , dyspnea , and various types of heart failure .
 None
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 None