symptoms occur with greater than ordinary physical activity
NYHA I
Symptoms occur with ordinary physical activity
II
symptoms occur with less than ordinary physical activity
III
symptoms may be present even at rest
IV
unable to carry on activity without symptoms
dyspnea at rest
IV
marked limitation of physical activity
can climb = 1 flight of stairs
III
slight limitation of physical activity
can climb 2 flights of stairs but with difficulty
II
no limitation of physical activity
can climb >/= 2 slights of stairs with ease
I