A 62 year old man is breathless following his heart attack. He is unable to climb a flight of 10 stairs without stopping. Which of the following is true?
- He has NYHA (New York Heart Association) class I heart failure
- He has NYHA class II heart failure
- He has NYHA class III heart failure
- He has NYHA class IV heart failure
- NYHA class is not appropriate for use in patients who have sustained myocardial infarction.